I need advice..

I’ve been off and on with a guy from a year and a half. Totally due to the fact, we both go to school and church together and we don’t want to be public and then something happen. We both have extremely high goals in life and it’s amazing because we’re both on the fast track to achieving our goals, but there’s a slight problem when it comes to our sex life. Neither of us are ready to have kids but condoms bother both of us and in allergic to birth control; now the major problem comes whenever he isn’t sure whether or not he needs to pull out yet. I’m not saying I’d hate my life if I did get pregnant but it would derail our lives. On top of that if something like that were to happen, that would be the last thing I would want to explain to either of our families or our church family. I just don’t know what to do 🤦🏻‍♀️🤦🏻‍♀️🤦🏻‍♀️ btw I’m only 17 and he’s 18