What are the chances

I’m in a very serious and committed relationship and we’ve been dating for over a year now. I’ve only been having sex for six months, I gave my virginity to my boyfriend, but I started birth control, and I’m terrified to trust it alone. I’m afraid that my pill just isn’t working for some reason. We also use condoms and he pulls out with the condom on but I’m not gonna lie, I’m still a little worried that I will get pregnant. What are my chances of getting pregnant? Am I being worried for nothing?