@giflian
I'd say that the worst is worse than that. Medical diagnosis focuses on problem traits, not necessarily autistic ones, and the two don't overlap a lot, even if they may coincide a lot. I've heard of people getting misdiagnosed with things like just depression, and then put on antidepressants and left wondering why they don't work. How often this happens I don't know, but it's a real possibility.
But even with an accurate diagnosis, that can come with negative effects too, like employers not considering you.
@jeffowski
Here's an article that may be helpful:
https://www.autismbc.ca/blog/autistic-adults/reasons-autism-self-diagnosis-is-valid/
There's another I know of but can't find right now. I'll post it if I can find it.