13 days late negative PG tests!

cassie

So my last period was Dec 13 2019. It lasted about 5 days. Me and my partner had been having unprotected sex a bunch of times. I know ovulation happens about 10-14 days after your period. So I'm thinking is it possible that I could be gotten pregnant at the beginning of the month and it's still not a whole month. Can I still be pregnant?