I'm just worried

Well me and my BF have had a lot of unprotected sex in second semester like everyday possibly more than once and we don't do it often anymore cause he's working and I can't see him . In the back of my head I wonder if I can be pregnant we have some scares here and there but at the end I get my period every time. There's girls out the that get pregnant on first try so why am I not pregnant I'm just curious not that I want to be right now.Either his pull out game is strong or mabie I can't have kids? Idk that's been in my mind working I'm probably over reacting but i can't stop thinking about it . I really hope that I'm just scaring myself because I really do want kids in the future