Levonorgestrel
"My girlfriend took Plan B on the 12th of May, 4 hours after our "incident" she didn't have any physical side effects but she did get very emotional. She would cry about everything - but she wasn't stressed about pregnancy. She got her period on 8 days later on the 20th. I'm telling you guys, don't stress out - as long as you took it within your 72 hours, you will be fine. Remain calm, put on your favorite movie and think positively!"