Advice

Last night me and my boyfriend were suppose to have sex for the first time ... But when we started and he went to take the condom out .. I got scared not because I didn't think I was ready or that I didn't want to because I did and I'm ready but I think I need to be put on birth control before I do anything . I want to be prepared and I don't want anything to happen like me becoming pregnant. I need advice was I wrong for stopping him and we should of just done it .?