I have been having lower pelvic pain for a week now and it's currently a week before my period. Last weekend I threw up two night in a row; however, it was over 5 hours after I took both of my pills. The next day I had diarrhea an hour after I took my pill. After I had sex a few days later, I took plan b just incase my pills did not stay in my system. I also had sex again recently and have had cramping during intercourse as well. What could be going on?