Levonorgestrel
"My accident happened on the 18th ( he came in me no condom) I within an hour ran out and got Take Action pill which is generic for plan B . Next day I had some light spotting that was dark Along with cramps and bloat but nothing excruciating. On the 23rd in the am I started bleeding heavy dark blood . Today the 25 th  and I am still bleeding heavy , this has to be my period . So for me it came just 5 days after the accident. My last normal period was 8/12-8/16. So two periods in a month . But I'm not pregnant . So just relax and let the pill work. I am 26 , 5'2 and 145#."