Levonorgestrel
"I've taken Plan B twice in my life. The first time was right after the 'incident', literally not even an hour after in the wee hours of the night we ran out to Walmart, came home took the pill and went to sleep. Can't say I remember anything crazy to that experience. I do remember my period came a bit early and the cramps were pretty severe and so was the bleeding. It took a bit for my period to get back to normal, but it did! This time around is a whole other story! I took it about three days ago, day of taking it was good, next day was good, yesterday midday I experienced nausea and vomiting, and now today diarrhea and cramps. Suppose to get my period anywhere from 3-5 days from now."