Levonorgestrel
"I'm only 17 I used plan b before can't remember if I got sick after taking it before. But me and my boyfriend had unprotected sex Tuesday 10th night when I was fertile, two days away from my ovulation day. I had him go get the pill the same night took it about 1/2 hours after. Took it with Mcdonalds and went right to sleep after couple days later I don't feel anything. But my breast are very sore and I'm just constantly hungry. Suppose to get my period on thanksgiving the 26th. Waiting game horrible ."