I have a question, so I got my period but before my period I thought I was pregnant my bf and I had…

I have a question, so I got my period but before my period I thought I was pregnant my bf and I had unprotected sex I know dumb but when you're in the moment you're not really thinking anyways I was having symptoms then I got my period I'm on day 5 so today I randomly got so nauseous and threw up also ive had cravings so is it possible I could be pregnant?