Okay so I started my period about a week early 06/21/12, weird, but it was normal like usual about 6days ending on 06/27/12 . On my last day it ended very early in the morning, so I had unprotected sex that night , so I had unprotected again on the 28th,30th&1st .. Inot trying to get pregnant I jus didn't bring anything with me & they didn't have anything either- I should have said no! Anyways, I started bleeding again yesterday, it is very heavy and somewhat clotty - does anyone know what this could be . I'm not feeling nausiated or anything but my lower back is hurting and just before my period my breast were a bit tender .. HELP please :)