Levonorgestrel
"I read these reviews daily when I was stressed, so I thought I'd leave one.I had to take Plan B after a condom broke on Day 12 of my cycle (so I was fertile & close to ovulation). I took it 45 minutes after the incident, and had no symptoms for around a week. After a week, I started bleeding. more than spotting but less than my normal period. It lasted around 5/6 days. I also had severely sore breasts, on and off cramps. Around a week after that I also had a lot of discharge (clear). These symptoms lasted on and off until I got my period yesterday. 



MY PERIOD WAS 23 DAYS LATE. Don't absolutely freak like I did. I went to the doctors and took pregnancy tests and still wouldn't calm down. Try to relax this works! Symptoms suck but not prego!"