Last night my boyfriend and I had sex twice. It was unprotected the second time, but he pulled out. I am on birth control and I was on my second to last day of my period. The only thing I am worried about is that he did not use the restroom in between times, and I know that once the guy ejaculates sperm could be left in his urethra that could come out in pre-ejaculation. Also, the week before, I took my birth control everyday, but sometimes I would be like half a day late. Should I be worried about possibly becoming pregnant and should I get the morning after pill? Or do I have nothing to worry about?