It may not be "normal", but it does happen. Being beyond adolescence, I think you should either seek therapy or try to understand for yourself that this is not really happening,,,which, IMHO, it is not. People laugh, people look, people do some fucked up shit! That does NOT mean that they are directing any of this at you. I know that you probably understand this on an intellectual level, but you must try to understand that most people are more concerned about themselves than they are about anyone else. It may appear that way, but it is untrue. If you can ubderstand that, then you will get better.