Please answer! I really need advice!?

Question

Please answer this question:

http://answers.yahoo.com/question/index;_ylt=AlMO9.5UnfVXWugqZPHsKODsy6IX;_ylv=3?qid=20070911172133AAizwfm

I'm really concerned!

Answer 1

There are so many things that can cause this and most are nothing to worry about. Some things it could be are:
stress
infection
a hormonal imbalance
non-ovulatory bleeding
pcos (polycystic ovary syndrome)

At your age, the most common cause is non-ovulatory bleeding. It never hurts to see a gynecologist though and it will put your mind at ease.