Bleeding a week after period

[pib23]

my boyfriend and i had unprotected sex last month around valentine's day and he finished inside of me. i took ec to be sure & my period came when expected (feb.23). my period was like normal but lasted 2-3 days longer than usual. my boobs stayed swollen & ive been very gassy lately as well as bloated. i work out regularly & i seem to have put on weight or make no change in body appearance. on march 3, we had unprotected sex again and he finished inside of me. today, 8 days after my period, i am bleeding & slightly cramping like a normal period. idk what's going on. help!!