Good sex but now I'm stressed

Ok so I just started college about a month ago.. within the first week I met this guy, and we made out a few times. About a week after I met him we had sex, it was my first time. I think since then (August 26/27) we've had sex 2 more times. We used a condom every time but I'm not on the pill yet. I know I should be fine BUT the past 3 days I've had this weird worry that I'm pregnant and it's totally irrational but I'm still freaked out? I just feel hella bloated and emotional and eat SO MUCH which I know is PMS symptoms but I'm just panicked now. I feel really fat and gross too but that's like all the time lol. Anyway I've always had a pretty inconsistent period but now I'm 2 days late and I've had sex 3 (one of those times was 4 days ago) times since my last period and I don't have any cramps, over exhaustion, boob/lower back pain, or short temper which I usually get when I'm PMSing. I'm just freaked out, probably unnecessarily but ahhh. Should I take a test would I be able to know by now? Just to ease my mind? Has this happened to anyone before I know I'm being dramatic but \_(ツ)_/