it took me YEARS to get diagnosed after my initial symptoms started showing up, since I was so young they kept switching diagnosis and all that, until they finally settled on paranoid schizophrenia and I was diagnosed at the age of 14.
Even tho I have an official diagnosis medication and all even my own dad denies it sometimes lol, he doesnt like to believe I actually have it, and usually people who deny it the most are adults, honestly most people my age believe me the moment I tell them and dont question it which is nice, ive had people tell me that I could cure it on my own and deny it but nothing has ever been too bad and most poeple just accept it