Possibly pregnant?

Okay, so on Oct 9th (a day after i stopped ovulating) I had sex with my boyfriend without a condom in the shower. He pulled out but I know pre cum can happen. I was suppose to get my period today but usually a week before my boobs start hurting. They didn’t this time. I keep feeling like mini cramps. And I couldn’t sleep at all last night. Tossing & turning. Has anyone ever had this happen before they knew they were pregnant or am I just paranoid. Lol