I had unprotected sex on 3 sept with my bf on the last day of my period .n he ejaculated twice inside. I took I pill with in 3 hr of sexual course. And I have experience light withdrawal bleeding. Since last 3 days. And a little back pain .what should I do. I am very concern about it. Today is the 6th day pf bleeding. Bleeding is too light. Bt occurring .regulry. Some times in does not come out. Bt stay remains inside vagina'wall..