I have been nauseated for the past couple of days, mild cramps and my stomach feels kind of heavy

I am in need of serious advice. I am on Gildess birth control, but I'm terrified I could be pregnant? I might just be psyching myself out because I still have a couple days left of my pills and I shouldn't even be starting my period yet, but I'm so scared that it won't come. My boyfriend and I have had unprotected sex twice this month on the pill, but he pulled out. I know that is very stupid, and we should have used a condom. I know that pregnancy can occur even from precum. We are both teenagers who come from very religious homes, and I definitely couldn't talk to my parents about this yet... We recently decided to go back to abstinence and stop having sex. We made the decision together because we felt guilty, but I'm scared it's too late. I have been nauseated for the past couple of days, mild cramps and my stomach feels kind of heavy? That might sound dumb but that's how I feel. I get sick a lot so I don't know what to contribute to a sickness or a possible pregnancy. I know that I could just be worrying too much and can be thinking everything is a symptom. If I am pregnant, abortion is not an option, so please so answers on that. Because I can't talk to my parents about it yet, I have no access to a pregnancy test either. Please help- I know the chances are slim because I am on birth control and he pulled out but still I'm scared.