I'm on the pill for a little over a year. I never missed a pill. However, two weeks ago my bf and I had intercourse without a condom I was on the second week of the pills that same day about an hour after I took an emergency pill that I had at home because we always use a condom but that day we didn't but I never missed a birthcontrol pill. I started placebo pills yesterday and today I'm supposed to get my period but there's no sign of my period coming. I've been having cramps since last week and continue d yesterday and today. Should I be worried?