Waiting list for Diagnosis

So at 22 I've realised i may be on the spectrum, I've been feeling overwhelmed by the uncertainty though as I want to be able to fully embrace it as part of me and meet others affected but i feel like i can't do this until official diagnosis as I don't want to claim to have something if i turn out to be wrong. I have heard the waiting list is long but i want to be in the queue but being in Wales, with a welsh GP (they don't have to refer to psychiatrists even if you request it) I'm soon to move back to england but i'm not sure i can get on the waiting list without an english GP. If anyone has advice please let me know:)