If you take birth control and the guy pulls out can you still get pregnant?

You are unlikely to be pregnant but you can still get pregnant. No contraceptive pill works 100%, it's more like 99% effective. As for pulling out sperm can still get into your vagina if he pulls out a bit late. It really is unlikely that you will be pregnant but there is still a tiny chance so If you think you might be pregnant take a pregnancy test. It's the only way you will know for sure.