Levonorgestrel
"I'm sharing my experience because my number one fear when taking the pill was the severity of the side effects everyone talks about. The way people have made it sound I would be sick all the time and I felt that was something to worry about with my busy life. Me and my bf had sex and didn't realize until it was over that it had broke. I took it maybe an hour after it happened and received light bleeding for no more than two days and then recieved my period ON TIME two weeks later. I'm sure I had symptoms but to put it in perspective I didn't have anything that felt out of the ordinary from an occasional headache or diarrhea from eating something bad and I'm not even sure those even correlated with the pill."