I'm on Birth Control but still scared of cum

M
I'm on birth control and have been on it for 2 years, but I'm nervous still about cum. My boyfriend and I have talked about him possibly cumming inside of me but I don't want to randomly come up pregnant we both arnt ready for kids at all. What should I do just keep on doing what we're doing (which is go raw and cum outside) or maybe try something new. He is 100% honest and said its my choice and he won't do it with out my concent.