Sex and pregnancy

Hello! A couple days ago me and my boyfriend has sex. We’ve only done it 3 times and this time the condom broke. I noticed it when we were doing missionary. I immediately told him to stop. I didn’t cum and neither did he, but I’m worried about that pre cum. I’ve read that it can get you pregnant or it can’t. I’ve been on birth control for about 2 years. Because of my work schedule and school schedule, I don’t really take it at the same but I do take it. I’ve never gone pass 11 before taking it. So my question is, could I get pregnant?