Ever since the end of October I have been feeling really weird. I haven't gotten my period for about three months, I've woken up nauseous. I get dizzy at times. Sometimes I can't even eat, while other times i cant seem to stop. I have gone to the bathroom alot more than usual, and I've had gas. The thing is I've never been sexually active so I cant be pregnant, I've gone to the doctors but they havent been much help. What should i do?