The delusional thinking is not part of autism... I have it too, but I also have a diagnosis of Schizoaffective disorder. I take an antipsychotic and a mood stabilizer to help. I don't know enough based on your post to make any suggestions as to what you may have, and I'm not a doctor, but if you feel like there's something not quite right, consult one. A psychiatrist or psychologist. Good luck to you!