In Nov I had on protected sex with my boyfriend and the next day i took the next choice pill. I got my period on the 27. And in dec I had sex again except this time it was protected and he also pulled out before he came and also the condom didn't break. I was suppose to get my period on the 29 and I haven't yet. But I took a test and it was negative. I was wondering if by taking the next choice pill did it throw off my cycle. Also I have been cramping for a few days now.