I am a 23year old female who has not had a period for over a year. I've had several ultrasounds one of which showed I had a cyst on my left ovary. I can't get a straight answer from the doctors I've been to. The cyst has ruptured now. Doctors have told me they don't know why I haven't had a period. I just want to know what is wrong with me. When I have a period it usually lasts for two months. Last time I had a period I had to be hospitalized and given a blood transfusion. I had lost 75% of my blood. Someone please tell me if they have had this happen to them.