Birth control

If you take your birth control every day, maybe not always in the same time frame but everyday is it okay for your boyfriend to bust in you without taking plan B after wards? I’ve been on birth control since I was 14 and have constantly taken it, periods come same time every month I’m 19 now, but I’m just wondering because it feels so good for the both of us and I would hate to spend money on plan b but would much rather that then a baby at this age