I have PCOS and didn't have a period for 3 years. Doc found out and sent me to have a uterine biopsy. I was given to understand that NOT having a period causes the lining to thicken which can lead to uterine cancer. Please don't let this go on too long, you're far too much fun to have to go through scares like that. For more info on PCOS you may want to check out Dr Charles Glueck ~ the Univ. of Ohio. Sure pricked my ears up. (He's on-line at the university)