FIRST TIME SEX??

Lucy
So my bf and I are both about to turn 16 and we both feel ready and comfortable to have sex, but the only thing I'm paranoid about is getting pregnant! I know condoms are decent for protection and I know that infertility runs in my family, but I'm so petrified of getting pregnant it scares me. Please help?!
 (also please no hate on my age? Its quite hurtful because I believe that I am mature enough and my bf is as well, I'm not just some dumb kid wanting to have sex)