Precum & BC

My bf and I had sex the other night unprotected at first, but then he put a condom on because he didn't trust himself to pull out in time. When we went to have sex again like 15 minutes later, he wanted to not use a condom right away.. I told him he had to wear one because I wasn't on BC and I could get pregnant the second time we had sex. He was convinced I'm crazy but I made him wear one..