It's Not in Your Head — It's in Your Hormones: What Every Woman Deserves to Know About Perimenopause

By Dr Angelique Oliveira - Functional Medicine GP

Not so long ago, women were institutionalised for what we now understand to be perimenopause and menopause.

Let that land for a moment.

The rage. The insomnia. The palpitations. The brain fog. The feeling of completely losing yourself, all of it, was pathologised as madness. Women were committed to asylums, medicated into submission, or told they were hysterical. It's a stain on our medical history. And while we've come a long way, the truth is this: too many women are still being dismissed, gaslit, and left to navigate this transition alone.

I'm writing this because I see it every day in my practice. Women in their 40s - brilliant, capable, resilient women- come to me feeling like they're failing. They say things like:

• "I used to cope with everything. Now, small things overwhelm me."

• "I wake at 3 a.m., and I'm wired, no matter what I do."

• "I suddenly have anxiety for no reason."

• "I feel like I'm losing myself."

• "My doctor says my bloods are fine, but I don't feel fine."

Here's what I need you to know: You are not failing. Your body is not broken. And you are not alone.

The Medical Training Gap Nobody Talks About

Most doctors, even women's health specialists, receive shockingly little training on menopause. In medical school, we get maybe a chapter. Maybe less. Perimenopause? Barely mentioned. I graduated knowing only that "menopause is when you stop your period." That's it.

Add to that the fact that clinical research has been overwhelmingly male-dominated. Women were excluded from studies because their menstrual cycles were considered "too variable." So, 50% of the population was excluded from foundational medical research. The result? A healthcare system that doesn't fully understand women's bodies — and doesn't know what it doesn't know.

This is why so many women are told "your bloods are fine" when they know, deep down, something is wrong. This is why symptoms are dismissed as stress, burnout, anxiety, ADHD, or "just ageing."

But here's the truth: Perimenopause can start up to 10 years before menopause. It often begins in your 40s, sometimes earlier. And it's not just about hot flushes and irregular periods. It's a full-body, nervous-system, mind-and-soul transition.

Why Blood Tests Alone Are Dangerously Misleading

One of the most harmful myths in medicine is that perimenopause can be diagnosed with a blood test.

Here's why that's a problem: In perimenopause, your hormones don't just decline; they fluctuate wildly. Estrogen and progesterone swing up and down, sometimes within the same cycle. Depending on when you test, you might catch a woman when her hormones look "normal" — or when they're all over the place.

So when a doctor says "your bloods are fine," what they're really saying is: "I tested you on this one day, and on this one day, your numbers looked okay." But that snapshot doesn't capture the erratic storm happening inside your body, the other 29 days of the month.

We are human beings, not lab results. Your lived experience matters more than a number on a page.

The Symptoms Nobody Warned You About

Most people think perimenopause is just hot flushes and night sweats. But the reality is so much broader — and so much of it is missed.

Yes, you might experience vasomotor symptoms (hot flushes, night sweats, sudden heat). But you might also experience:

• Anxiety and panic attacks — seemingly out of nowhere

• Brain fog and difficulty multitasking — you used to juggle everything, but now you can't remember why you walked into a room

• Rage or irritability — disproportionate responses to small triggers

• Insomnia — especially waking between 2–4 a.m., wide awake and wired

• Palpitations and adrenaline surges — your heart races for no clear reason

• Joint pain — frozen shoulder, knee pain, stiffness you can't explain

• Headaches or worsening migraines — often hormonal, tied to your cycle

• Weight gain around the middle — despite no change in diet or exercise

• Loss of confidence and motivation — feeling like you're not yourself anymore

These symptoms are often dismissed as stress or burnout. But they're not. Their nervous system symptoms driven by hormonal fluctuations.

The Nervous System–Hormone Connection

This is the piece that changed everything for me as a practitioner.

Estrogen and progesterone don't just affect your reproductive system. They affect your brain, your autonomic nervous system, your sleep, your mood, and your stress tolerance.

When estrogen fluctuates, it impacts serotonin, dopamine, mitochondrial energy, and temperature regulation. When progesterone declines, you lose access to GABA, the calming neurotransmitter that helps you sleep, stay emotionally regulated, and handle stress.

This is why women in perimenopause say: "I used to be able to handle this. What's wrong with me?"

Nothing is wrong with you. Your stress resilience has been biochemically reduced. It's not a character flaw. It's physiology.

And here's another critical piece: cortisol steal. When your body is chronically stressed, it prioritises making cortisol (the stress hormone) over making sex hormones. So your perimenopausal symptoms go into overdrive not because you're weak, but because your body is in survival mode.

This is why nervous system regulation isn't optional. It's medicine. Vagal nerve toning, breathwork, somatic practices: these aren't "nice-to-haves." They're essential interventions that support your body through this transition.

Bioidentical Hormone Replacement: The Gold Standard

Let me be clear: I believe in trying lifestyle interventions first. Nutrition, movement, sleep hygiene, nervous system regulation, stress management, all of it matters. But when hormone replacement is needed, bioidentical hormones are the gold standard.

Bioidentical means the molecular structure is identical to the hormones your body produces. This is not the same as synthetic hormones (like "the pill") or the old-school HRT that scared everyone in the early 2000s. That research was based on synthetic hormones. Bioidentical is different.

When done properly, bioidentical HRT includes:

• Estrogen - for cardiovascular health, joint lubrication, energy, mood, and dementia prevention

• Progesterone - for sleep, calm, emotional regulation, and stress resilience

• Testosterone (low-dose, compounded) - for drive, muscle mass, motivation, and libido

• Vaginal estrogen - to prevent vaginal atrophy and recurrent UTIs (this is critical and often missed)

This is personalised medicine. What works for one woman won't work for another. It takes time to find your recipe. But once you do, it can be life-changing.

What You Deserve

• You deserve a doctor who listens.

• You deserve a doctor who doesn't dismiss your symptoms as "just stress."

• You deserve a healthcare system that recognises perimenopause as the significant life transition it is, not a footnote in a textbook.

If your doctor isn't equipped to help you, it's okay to find someone who is. Advocate for yourself. Educate yourself. And most importantly, find your tribe.

Women need other women. We need to talk about this openly. We need to stop suffering in silence, thinking we're alone or failing. We're not. We're in a massive hormonal and neurological transition, and we need support, medical, emotional, and communal.

Functional medicine recognises that you are a whole person — mind, body, and soul. You are not a lab result. You are not "fine" just because your bloods came back normal. You are a woman navigating one of the most significant transitions of your life, and you deserve to be seen, heard, and held through it.

You are not failing. Your body is not broken. And you are not alone.

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Dr. Angelique is a Functional Medicine GP specialising in women's health, perimenopause, and bioidentical hormone replacement therapy. She believes functional medicine is the future — because it's what medicine was before it lost its heart.