So I started taking birth control and it was the 3rd day I was on it. But on the 3rd day I had sex with my boyfriend and we used a condom. He didn't finish inside of me but he did have precum. But during intercourse he lost the condom.. so the next day he said that it might be inside of me and it was.. SO the next day I took Plan B. I'm very paranoid. And I don't know what to do. I've been taking my birth control regularly after I took plan b.