Last week my boyfriend and I had unprotected sex, I am not on BC, he started ejaculating and pulled out kind of late. So there was a possibility of me getting pregnant. This was a Monday night and I wasn't able to get and take the plan B pill until Wednesday morning. A few hours after taking the pill I started cramping extremely bad, I started to feel nauseous and I had diarrhea for a few hours. I have a 3 year old and the cramping reminded me of being in labor. I have a period tracker app, which has been very accurate for almost a year now, and it shows when I'm fertile and ovulating. I was fertile the night we had sex, and ovulated a few days later. I'm no longer fertile but I am still cramping very badly, but no bleeding. Has this happened to anyone else? And if so, did anyone end up pregnant?