My fiance and I have had unprotected sex several times this month. My boobs hurt for like two weeks straight and I was extremely tired, hungry, and two weeks ago I though i started my period and didn't think much about it but it only lasted for a day and it was over with. I started my period yesterday(4/30/11) and I don't every month until the 1st and my cramps are pretty painful and there's a heavy flow...i have no idea whats going on...answers anyone?