Scared to tell my boyfriend I want to take a break from sex?...

My boyfriend and I recently lost our virginities to eachother and we’ve done it twice. I know it’s not much and others are way more sexually active but I’ve been giving it some thought and I realized I won’t be able to really enjoy sex because id be too paranoid about getting pregnant. I don’t want to get on birth control because I don’t really trust it and I don’t trust condoms enough too. He never pressures me into having sex and he respects me for it but for some reason I’m just nervous to tell him I don’t want to do it for a while. What should I do..