Sex at 14

Stephanie • 14 but mature for my age apparently😴
So I'm 14 and in a on and off again relationship. Basically he's a friend with benefits and we've come across the topic of sex multiple times. I feel like I'm ready both mentally and physically. But I have one problem. I scared that even with a condom there's a chance I might get pregnant. 
I'm not saying that I'm going to have sex for sure but it might happen. I don't know how I could get birth control and i really want to get it just incase so do you guys have any suggestions about how to get it or other forms of birthcontrol? Thanks!