Hi I have a very normal 31 day cycle I was wondering if I had unprotected sex in which he did finish inside me on days 8,15,16 of my cycle could I get pregnant

Yes it is possible to get pregnant anytime in your cycle because there is no way of telling exactly when your ovulating and also because sperm can live in the body for days after intercourse.

Yes, especially since those fall in the days that women averagely ovulate. And the fact that he finished in you with no birth control. If you don't get pregnant you'll be very very lucky. Unless you wanted to get pregnant?

Thank you not actively trying but would be happy if we did