I have been taking the birth control pill Microgestin for almost a year now. My period has been fairly normal during this time. For the past 4 months or so, I have not always taken the placebo pills, I just continue with the hormone pills. Last month, my period started while I was taking the hormone pill and lasted for 2 weeks. My boyfriend and I had unprotected sex (well, not really sex - he put it inside me for barely a minute) about 3 weeks ago. He did not ejaculate. We do not do this on a regular basis - it's only the 3rd time. I have been taking the placebo pill for 4 days and have not yet gotten my period or any of the symptoms I usually get right before. Is there an explanation for this, other than potential pregnancy? I am hoping it is just my body trying to get back into a routine after being all over the place after the last few months.