diagnosis

Hello

Who is the best person to see if I think I have autism, I have been diagnosed with a mental health disorder which I have never really considered myself to have, the more I read about being autistic the more I can identify with it, I just can't see my GP doing anything? I have taken an online test (RAADS) and I have scored highly in this. Has anyone else gone through this scenario, wheres best to start?

Thanks in advance