Late period help my anxiety

My boyfriend and i have sex w a condom on and he pulls out every single time, but we had sex 2 days before i was about to start my period (he had a condom on and, again, he pulled out) and now my period is 3 days late. Could it just be because we had sex and it just delayed my period? Ever since i started having sex my period would come a couple days late and i freak out every time.