Levonorgestrel
"I took this pill 2 days after unprotected sex (July 16th) and bled a little 4 or 5 days later. I think it was just withdrawal bleeding not a period. So anyway August gets here and I still have yet to get my actual period. Didn't get one all of August so I bought a home pregnancy test beginning of September because at this point I didn't think Plan B had worked (although I had no typical pregnancy symptoms). Anyway I took two home pregnancy tests and they both came back negative. This morning I started getting bad cramps and finally I got my period. Now I know this pill is different for everyone but I'd say unless you absolutely have no other options then don't take this pill. Just get on birthcontrol or have the guy wear a condom. I am relieved I'm not pregnant though."