Unprotected sex

I recently had sex with a guy I’ve been talking to. We’ve only ever had sex twice but both times it was unprotected. I got my period after the first time but recently the second time which was last Friday, I have been feeling weird. On Wednesday I started feeling dizzy and nauseous. It’s Thursday now and I keep getting that feeling but weird pains in random places as well I’m scared to find out if I’m pregnant but I also don’t know if I’m just over thinking it being that my period is supposed to come in 11 days. Please help I need to know what to do! Thank you!