intercourse

hi there I am on the pill .. haven’t had sex in over 5 years .. just recently got a boyfriend and we had unprotected sex on july 12th (took the morning after pill the next morning) and had unprotected sex on the july 22nd .. both times he pulled out but i’m still freaking out because i’ve been a little nauseas and i’ve been getting dizzy recently .. I take my birth control religiously .. my period isn’t supposed to start for another 2 weeks .. any idea what’s going on!?