Scared 19 yr old

Okay so i have been off my birth control for a month now just because i couldn’t afford it this month but my boyfriend and i had sex about two weeks ago and we used a condom and checked it and it was fine. I have noticed I’ve gained weight and have indigestion sometimes when i eat pasta and I’m terrified i might be pregnant. So can someone please help me (btw i get my period in five days)