This is hard. I have had a similar experience.
I have shared that I had substance abuse issues (addiction to pain killers), my last stint in Rehab they slapped a Bipolar Dx on me after seeing me for two days. The current anti-depressant was not working and they augmented it with Lithium and that DID help. And because it helped, they said "Ahhh, see she's Bipolar!" My thoughts were skeptical, but everything else had failed so 'okay.' Back track to a childhood full of trauma and a diagnosis of ADHD with Ritalin.
Now they KNOW that trauma can mimic so much.
I stayed clean and gave my brain time to heal, got off the Lithium slowly. Felt no differently, didn't act any weirder than I had always been. But little cracks started showing that led the doctors to order a Neurocognitive exam. Bam, ASD. Based on the questions and my answers to the questions, the various other aspects of the tests and those results I found a diagnosis I agreed with. I could see it in my self and my behavior all through out my life.
This is what I learned: Medicine is based in science but the practice of medicine is an art. And so often doctors plug holes instead of getting to why there's a leak. I'm not sure if I read that you were placed on medication, but it's not wrong to wonder what our brains would be like if we'd had an accurate diagnosis all along and could've skipped the changes those medicines made to our brains. If I'd known I had ASD, would I have still become addicted to drugs? The pain killers were a solution for a while, until they weren't.
My heart is sad for you. I'm glad your doctor/therapist is on a track. Trauma work really does work, I hope you get to see the rewards.
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Disagreeing with you doesn't mean I hate you, it just means we disagree.
Neurocognitive exam in May 2019, diagnosed with ASD, Asperger's type in June 2019.