Pregnant

This is probably going to make me sound dumb but I’m worried. I haven’t gotten my period yet but it’s not due for another 5 days. I had unprotected sex Sunday the 6th of this month and had just started birth control and had been on the pill for one week. Is there a high chance I could be pregnant? My boyfriend didn’t finish inside of me or on me or at all. But even though he didn’t finish at all. Is there a HIGH chance. I’m just stressing because I’m usually cautious.