I ve been on Camrese birth control for 3 months now, I ve never missed a dose but sometimes I might be an hour late taking it. My boyfriend and I started having unprotected sex about a month ago (we use the withdrawal method and the birth control). My period is supposed to be this week but it hasn t shown up at all. I ve had cramps this week and now I have found that I have a small amount of brownish discharge. Is this normal or could I be pregnant?