Losing virginity

Okay sooo i lost my virginity on March 1st he used a condom then we did it again on Monday he went raw at first then he used a condom but he didn’t cum so is there any chance i could be pregnant im supposed to get my period this week but there has been a lot of people telling me that when you lose it for the first time you can get your period 2-3 months later. How do i know if im pregnant or not? My stomach has been feeling a little weird because i haven’t eaten anything but i haven’t been hungry in the past few days i’m probably nervous or something i dont know someone answer please.