Feeling anxious about first Psychiatric appointment next week (CW: minor self shame)

Recently started with a new therapist who specializes with Autism and ADHD (and seems to also have ADHD imo - I'm too afraid to ask at this point), and got the "yeah, I can't diagnose ADHD, but I'm going to refer you to my psychiatrist's office to get assessed" yet I'm still feeling anxious that my brain isn't fucked up enough to get a real diagnosis. Literally filled out an ADHD self-assessment paperwork where 90% of the criteria were checked "sometimes", "often", or "very often" (plus I can think of recent and old examples of each) and I still fear some kind of rejection.

I've spent the last 6-12 months ruminating on all the extremely ADHD moments I've experienced throughout the decades I've been alive, but somehow I still have fear that I'm not dysfunctional enough or something. That, and mourning the non-existent potential version of me that had parents who cared enough to realize I was struggling the whole time and do something about it.

Anyways, thanks for reading my bizarre ranting post!