Please help

Hello everyone. I am an 18 year old girl and I am on the birth control estarylla. I take it everyday but sometimes I end up taking it 2-3 hours after my alarm. Anyway. About a month ago my boyfriend and I had unprotected sex and he pulled out. That week before we had sex, I took my pill late a couple of times. 2 weeks after having unprotected sex, I was bleeding for 5 days and spotting for a day before the bleeding and 2 days after. It’s not almost a week and a half after my period has ended and I’ve been super nauseous since the last day of my period and it just is getting worse. Was the bleeding my period? Could I be pregnant? Please help