Autism used to be frequently misdiagnosed as Schizophrenia. As a coping mechanism I have hallucinations, and have had delusions as well. It's my brain's way of dealing with things. Hallucinations are really common for me though; there isn't a day now when there isn't something. I have dissociative amnesia, and recently memories are coming back, so my hallucinations happen much more often than they have done in the past. For me it is because of autism, psychosis and mental disorders have been ruled out