Ok I have bern on the pill for about 4 years now and have never missed a period. Well about a month ago we ran out of condoms so we,had sex without using condoms but he would pull out everytime. I still was taking my pills I just like to use condoms for extra protection. Ok then that same month on the 1st day of my sugar pills we had sex. The next day I took the plan b pill just to be on the,safe side. Well its now been 3 weeks since taking the plan b pill and I did not get a period. could it be that it made me miss my period. Or could I be pregnant? Help please!