Back in April me and my husband had sex and the next morning i got my period but i still took a Plan B pill and my period when away for a few days and came back. in May the same thing happened but my period never came back and im having bad cramps. But ive been taking the pill every month since October, sometimes even twice a month. so i dont know whats going on, would i be possible im pregnant ? or is it just a side effect since i was using the pill so much ?