Growing up as an undiagnosed autistic girl in an unsupportive environment

What is the impact of growing up as an undiagnosed autistic girl? This piece explores masking, nervous system overwhelm, self-doubt, and the emotional impact of receiving a diagnosis later in life.

There are many autistic women who reach adulthood without realising they are autistic.

Not because the signs weren’t there.
But because they were missed, misunderstood, or explained away.

Especially for girls growing up in environments where emotional needs, sensitivities, or differences weren’t properly understood.

So instead of receiving support, they often learn something else entirely:
that there is something wrong with them.


Learning to monitor yourself

Many autistic girls become highly observant very early on.

They notice:

  • the reactions of other people
  • what gets them criticised or rejected
  • which behaviours are “acceptable”
  • how to avoid conflict or embarrassment

So they begin to adapt.

To mask.
To rehearse.
To overthink.
To become who they need to be in order to feel safer.

And because many autistic girls internalise rather than externalise distress, this often goes unnoticed.

From the outside, they may appear:

  • quiet
  • shy
  • mature
  • sensitive
  • anxious
  • “high functioning”

Meanwhile, internally, they may feel overwhelmed, confused, isolated, or fundamentally different.


When home doesn’t feel emotionally safe

Growing up in an unsupportive household can deepen this even further.

Particularly if:

  • emotions were dismissed
  • sensitivity was criticised
  • needs were minimised
  • there was instability, anger, control, or unpredictability

In these environments, autistic traits are often not recognised with compassion.

Instead, a child may be labelled:

  • difficult
  • dramatic
  • lazy
  • rude
  • selfish
  • “too sensitive”

Over time, those labels can become internalised.

Not as:
“I process the world differently.”

But as:
“I am the problem.”


The nervous system learns to stay alert

When someone grows up constantly trying to predict reactions, avoid criticism, or manage overwhelm, the nervous system adapts around survival.

Many women describe:

  • chronic anxiety
  • hypervigilance
  • burnout
  • people-pleasing
  • perfectionism
  • difficulty knowing who they really are

Because so much energy has gone into monitoring themselves and trying to fit into environments that never truly felt safe.


Masking can become an identity

For many autistic women, masking begins so early that it no longer feels like masking.

It just feels like:
“who I have to be.”

They may become highly skilled at:

  • appearing socially capable
  • saying the “right” thing
  • caring for others
  • hiding distress
  • suppressing sensory discomfort

But this often comes at a cost.

Because when you spend years adapting yourself for acceptance, you can lose touch with what feels natural, comfortable, or authentic.


Receiving a diagnosis later in life

For some women, receiving an autism diagnosis brings immense relief.

Finally, there is language for experiences they’ve carried for years.

Things begin to make sense:

  • the exhaustion
  • the overwhelm
  • the sensitivity
  • the social confusion
  • the feeling of being different

But alongside relief, there can also be grief.

Grief for the younger self who struggled without understanding or support.

Grief for the years spent believing:
“I’m broken.”


The grief can be complicated

Late diagnosis can bring up anger, sadness, and confusion.

Some women begin to reflect on:

  • how differently things might have been
  • relationships that harmed them
  • how much they pushed themselves
  • how often they ignored their own needs

And there can be a painful realisation of how unsupported they truly were.

Especially if the people around them failed to see their distress because it didn’t look how they expected autism to look.


Relearning yourself

One of the biggest parts of healing after late diagnosis is often not “becoming” someone new.

It’s uncovering who you already were underneath the masking and self-surveillance.

That can involve:

  • understanding your sensory needs
  • recognising burnout
  • questioning internalised shame
  • learning what safety actually feels like
  • allowing yourself to take up space differently

It can be both freeing and deeply emotional.


There was never something “wrong” with you

Many autistic women grow up believing they are:

  • too much
  • too emotional
  • too difficult
  • too sensitive
  • not enough

But often, they were navigating environments that did not understand or support the way their nervous system worked.

That’s very different from being flawed.


A different understanding

For some women, diagnosis is not about putting themselves into a box.

It’s about finally being able to look at themselves with more compassion.

Not through the lens of:
“What’s wrong with me?”

But:
“What happened to me—and what do I need?”

And sometimes, that shift changes everything.

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Sarah Phipps
Sarah Phipps

I’m Sarah Phipps, a BACP Accredited pluralistic therapist working with adults who are navigating the impact of childhood trauma, anxiety, depression, and narcissistic abuse. I offer a calm, non-judgmental space where you can begin to make sense of your experiences at your own pace. My approach is collaborative and neuroaffirming, and I work with people of all backgrounds, identities, and neurotypes. I aim to meet you as you are, helping you reconnect with yourself and move forward in a way that feels more grounded, understood, and your own.

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