Levonorgestrel
"So me and my boyfriend had unprotected sex. My period ended December 27th and we had unprotected sex on January 1st. He didn't know if he cummed or not so to be safe I took a plan b pill about 3 hours after. It caused my period to be 3 weeks late, but today February 8th my period started. I was constantly on here reading reviews and stressing myself out. So if you are stop it!! It works!! Just give it time"