Could I be pregnant ? 🤰🏼

I had unprotected sex (ik , my first mistake) this wasnt my forst time having sex , but yes it was unprotected. I was on the 2nd to last day of my period & i have no idea when i start ovulating. Any help on that? also if im not ovulating can i get pregnant? Ik sperm can live up to 7 days in a women , so any help here ladies?