I'm 17 And My Period Just Ended And I Really

I'm 17 and my period just ended and i really look bloated is that normal I've been eating normal and healthy also had sexual encounters with my boyfriend 3 weeks ago but there wasn't any seaman that got in me the condom didn't rip can there still be and chance that i could gotten pregnant or maybe I'm having acid reflects or something can you help idk what to do