What should I expect from assessment?

Hi,

I recently went to the GP for mental health and ended up being referred for an adult autism assessment. This GP is not the first to discuss this with me and I do know that it fits in much the same way as dyspraxia did when that was suggested by my university's disability services a few years ago - which I went on to be diagnosed with, and not like dyslexia, which I was also assessed for but wasn't diagnosed with. However, I'm always wary of medical student syndrome as an allied health student.

The waiting list for assessment is up to 9 months long, so I have a long wait before I know. I was just wondering if anyone here has experience of assessment as an adult and could share some of their experience? I really don't like going into things without knowing what's going to happen.