Levonorgestrel
"I'm only 17 and Plan-B saved me from a lot of trouble! My boyfriend and I had sex the day after I finished my period. We realized the condom broke after we were finished, so I took the pill about an hour after. I experienced slight acidity/heartburn and had a very minor stomach ache the next morning. Five days later, I got my period! I'm so thankful for this pill and I don't know what I would have done if this wasn't an option."