Can I end up pregnant ??

So me and my boyfriend had sex on Saturday night and Sunday morning and I didn’t know I was ovulating and my most fertile day was a day ago. Could I be pregnant? Or in this case get pregnant? (We didn’t use a condom and he came in me) I heard that the semen can live in your uterus for up to 5 days??

I am trying to have kids but I’m just asking cause this would be my first.

UPDATE: YES I KNOW UNPROTECTED SEX CAN LEAD TO pregnancy IM JUST ASKING THE SIMPLE QUESTION THAT IF MY MOST FERTILE DAY WAS 2 days ago AND I HAD SEX ON SUNDAY AND SATURDAY IS THERE A HIGHER CHNCE OF ME GETTING PREGNANT. I REALLY DONT NEED THE WHOLE “EDUCATE YOURSELF” SPEECH THATS WHY IM ASKING.