Not that long ago I had a miscarriage so I just purly got my birth control from my doctor and he told me I can star taking the pill since I didn't know when period was going to began so I started taking my birth control that same day I got it from the doctor by the third day on the pill i stared my period but still kept taking it by the 11 day on the pill i was at the end of my period and had sex with my boyfriend and he stayed inside of me. What are the chances of me becoming pregnant? How fast does the birth control work? Can I become pregnant even dough I was was on my period n had sex but was on the 11 day in the pill ?