Unprotected sex

Okay so me and my boyfriend had sex for the first time on 4/20 so we did it and then we showered and did it in there too and later on after showering we did it again .. he pulls out and that’s our only protection.. so we did it again yesterday and I wanna start birth control so I won’t be scared all the time but is pulling out safe ? Like I see him do it and stuff but I’m terrified of pre cum and accidental stuff like that or maybe I’m over thinking this whole pregnancy thing ??