Possibly pregnant?

Alright so I am 15, and I was on my period like two weeks ago and on Friday of my period I had sex twice, once with a condom once with no protection. Then on Sunday (still on period) I had sex twice, he pulled out the first time and no form of protection the second time. Since then my period was spotty. I started my period on the Wednesday of that week and ended in on Sunday/Monday. Then the whole week after that I was nauseous and dizzy and random periods of time. Now(week 3) I have had that as well as my body being weird, could I be/get pregnant or no? Thank you guys!!! ❤️ (I know I sound dumb lol, I am sorry)