I am 19 years old and I first got my period when I was 13 and it lasted for almost 3 weeks! and after that I would only get it maybe once or twice a year and its very irregular. Now it has progressed to maybe 6 times a year and lasts about a week to two weeks. I never know when I am going to have a period. I was sexually active with my now ex boyfriend for months and we had always had unprotected sex and never once did I become pregnant. I am overweight so that may be a cause. and I dont have symptoms for poly cystic ovary syndrome. Can I become Pregnant????