Making sense of later-life diagnosis of ADHD and autism

Making sense of later-life diagnosis of ADHD and autism, or both together (AuDHD) is an area many people struggle with. This can include all diagnoses of neurodivergence, regardless of timing or who made them, and whenever individuals start linking their feelings of difference to neurodivergence. However, you don’t have to struggle with this alone.

Later-life diagnosis can stir a complex mix of emotions, often reflecting the relief and challenges of finally making sense of our experiences after years of uncertainty. These feelings, shaped by our unique backgrounds, characteristics, and circumstances, can differ greatly from person to person.

On the one hand, diagnosis can offer benefits like better access to support and a new perspective on past experiences. But on the other it can also bring depression, anxiety, shame, and inadequacy. We may feel anger and regret, wondering how life could have been different, and even resent missed opportunities.

We may start reflecting on the past, asking, “What if?” What if we had known earlier—how different could life have been? These thoughts can spill into the present, leaving us unsure about the future and what the diagnosis really means. We might also worry about sharing our experiences of neurodivergence with loved ones, fearing they won’t believe us, especially without a formal diagnosis.

Common feelings around later-life diagnosis

Common feelings about later-life diagnosis of ADHD and autism can include the following. You may have felt all, some or none of these, or perhaps you might be longing to feel things like hope and empowerment, but you’re just not there yet. Wherever you are, know that you can reach out to me for support.

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Anger and frustration

Why anger surfaces: Anger often comes from missed signs that doctors, teachers, or caregivers overlooked. We might feel frustrated with a system that failed us or be angry at ourselves for not noticing sooner.
Frustration with coping mechanisms: We may also be frustrated by the coping methods we’ve used over the years, especially if they were ineffective or harmful.

Grief and regret over missed opportunities

Grieving lost time: We may grieve realising an earlier diagnosis could have brought better support and opportunities.
Regret about past struggles: Regret is common as we think about how life could have been different with earlier help.

Shame and fear of stigma

Internalised stigma and shame: Some of us may feel shame due to the stigma surrounding ADHD or autism, especially if we grew up in environments where neurodiversity was misunderstood.
Fear of judgement: There can be a deep fear of being judged or treated differently by family, friends, or colleagues once the diagnosis is revealed.

Scepticism and doubt

Questioning the diagnosis: Scepticism is common after years of not knowing about ADHD or autism. We might doubt the diagnosis or feel unsure about its impact on our lives.
Questions from others: People may also dismiss or invalidate our diagnosis, doubting our experiences and feelings.

Exhaustion from the effort of masking

Why masking is draining: Many of us have spent years hiding who we really are – and pretending to be like everyone else – to fit in. After diagnosis, we often feel exhausted and regret hiding our true selves.
Reflection on the past: This can cause regret for not living authentically and frustration with the pressure to conform.

Confusion and identity shifts

Impact on self-identity: A later-life diagnosis can cause confusion as we reassess our identity. We may question how much ADHD or autism shaped our behaviour and personality.
Uncertainty about the future: This new understanding can bring uncertainty about how to navigate the future.

Relief and validation

Why relief is common: Many feel relieved because the diagnosis explains lifelong struggles with focus, social interactions, or sensory issues. It validates our experiences, showing that our difficulties stem from neurological differences, not personal failings.
Impact of understanding the diagnosis: This clarity helps us make sense of past challenges and brings relief.

Curiosity and self-reflection

Desire to learn more: A late diagnosis often sparks curiosity. We seek information about ADHD or autism to understand our past behaviours through the lens of neurodiversity.
Growth through learning: Gaining knowledge leads to growth and self-acceptance, helping us view the future more positively.

Self-compassion and forgiveness

Cultivating self-compassion: After processing the diagnosis, we start to develop self-compassion. Realising our struggles are due to neurological differences, not personal failings, helps us be kinder to ourselves.
Letting go of past self-judgment: This new self-awareness lets us release long-held guilt or self-blame.

Empowerment and hope for the future

The positive side of the diagnosis: A diagnosis often brings empowerment and hope. With better self-understanding, we can find tools and strategies to manage the impacts of our neurodivergence and improve our lives.
Looking forward with hope: This new knowledge makes us optimistic about making positive changes in the future.

The feelings above reflect in some ways the journey of reconciling our past experiences with newfound understanding of our neurodivergence. My own experience, combined with my work with clients, shows me that it’s possible, under the right circumstances and with the right support, to move through some of these more negative feelings towards a place of greater acceptance. Reach out if you’d like to explore how working with me might help you reach a place of acceptance with your neurodivergence.