Birth control for teens

I'm in a relationship with a guy for almost 1 year and a month, we're both 16. We've tried lots of thing in sex but what we haven't is he ejaculating on or in my vagina. To be honest, our first vaginal sex was weeks before the anniversary. We were always ready to do it but fear always stopped us until then. Another thing is that every time we have sex we fear, waiting for my period to come.