Levonorgestrel
"So just like everyone who's basically commented, I had unprotected sex with friend of mines (I know VERY stupid) on. VERY drunken night.. Of course he came inside me & to make matters even worse I was ovulating around the time, so about 11 hours later I rushed to Cvs and bought the aftera pill.. Trust me when I tell you it was the LONGEST two weeks ever!!!!!!! I googled every possible pregnancy symptom, every possible side effect of the aftera pill which are basically one in the same but finally just  when I decided I'd buy an early response prego test my period comes, which it came two days early.. But I'd rather early than NEVER.. So it works but trust me when I tell you it's not fool proof so just save yourself the time & get bc.."