I am only 13 years old. Yes i have started my period before. Well I haven't had my period in probably over 6 months. And i have never had sex before so i cant be pregnant. I told my mother about it so she took me to the doctor to make sure nothing was wrong. Well i had to do a pregnancy test. It was a negative. The doctor told us nothing was wrong with me. Its been like 3 months since i was there about this problem. Well i still have not had my period. And as much as i enjoy not having my period i still wonder if something IS wrong with me. Please HELP!!! Do you have an idea of why i have not had my period in like 7 months?