15 year old female, NEVER had sex. I am nauseous all the time, I have horrible frequent headaches (around the same time every day, in the same place) I am craving extremely weird foods. I don t get my period on a schedule, because I m very athletic, I get it about once every 3 months. This last time, I had a normal period, but it lasted 3 weeks, then about a week after that, brown discharge. What s wrong with me?