Thank you very much indeed for the terminology, I needed this word. Delusional Disorder is indeed a much more acceptable diagnosis than Schizophrenia for the problems and distresses we're talking about.
By the way, of course, I'm not a doctor, please don't ask for a private examination, friends, I don't want to earn 50-100 thousand dollars a month with psychotherapies for 2000 dollars and study medicine

What would I say to my friends and professors at university, I was already doing this job as an amateur, and if I say I get my diploma and have peace of mind, people will drive me away from school by cursing and beating me.