For people that have been diagnosed with any mental illness/disorder/ whatever you should call it, did you yourself suspect something was wrong with you before your diagnosis?

It seems to me that one should not suspect something is wrong with them, thus making their condition more of an illness, and not chosen behavior. I realized young that I was not normal, but I think that I've spent so much time thinking about what might be wrong with me that there must not be anything wrong. Did you yourself decide you needed to seek help, or did others insist that you sought help/ did you reach a breaking point? When did you know you had to do something about your condition?