So I have the memory of a fish, which led to me constantly forgetting to take birth control. Since it completely messed up my period cycle I stopped, hey I was using it for acne and have never been sexually active so why not?

I've started taking it again before my bf and I started dating (about a month ago), and we're starting to get down to the sexy stuff. We use a condom, but just in case any mistakes happen will bc help prevent pregnancy?