condom broke...help!!

my boyfriend and I had sex this morning. I am on birth control and we used a condom(at least we thought) he came Inside me  but when we ended we saw that the condom had broken at some point. we are both very paranoid. I took plan b about 30 minutes after. I washed myself out and peed, not sure if either of those affected the chances. please I need some reassurance that it's okay!!