I need help

Okay so about last week me and my man had sex but we had to take a plan b because the cum came out the coo done through the top not the tip okay so the day after I took the pill.. we had sex on thanksgiving and he was going rough I’m not gon lie but I was bleeding a little (which is Normal after a rough night) it usually stops that day or a few hours after but it kept going .. it was a medium brightish red this is now day 3? And I’m still bleeding medium .. the blood is somewhat thin and my titties have been sore for bout 2/3 days now .. I did experience backaches but my period is not projected for another 12 days .. what do you guys think is going on ??