Levonorgestrel
"I made a mistake & had sex with out protection with my boyfriend, he didn't pull all the way out & we were going crazy. I waited 1 day after we had sex to take the pill, later that night my stomach was cramping up & I felt like I was going throw up but I didn't. 
This was my first time taking a plan b and I really was scared that it wasn't gonna work. I read all different reviews and I was so scared, my period was suppose to start January 11th and it came on a few days early and I'm so happy!"