Does this effect my birth control?

Right before my period for a few days I was late taking my birth control 2 hours late for two days, 3 hours late for one day and then 4 hours late one day. All were mixed up, not in specific order. I had sex all those days, or maybe just 3 of them. I know for sure I did on the 4 hours late day. They were unprotected. It was all exactly four days before my period, and of course I still got my period. I believe the 4 hour one was the second to last day before or the day before my period. Could it still be possible to get pregnant from that? I ended my period 4 days ago