Birthcontrol

So I know this sounds -soooo- stupid. But, can you still get pregnant even if you're on birthcontrol?

Me and my bf like the idea of him cumming inside me, but because I currently do not take birthcontrol, we don't want the risk.

I wanna know because I wanna be able to have sex without a condom (or at least just have him cum inside me) without the chance of getting prego.