Birth control and period

Hey everyone. So my period is supposed to start from October 5-10 which unfortunately is the same day that my boyfriend comes home from the Air Force. Of course I don’t want to be on my period. I ordered birth control and picked it up yesterday because I also don’t want to get pregnant. I figured if I start my birth control this week or next, maybe it could postpone my period from coming? I don’t know for sure but any advice ? Thank you