TMI (Pregnancy)

Okay so, about a week or so ago my boyfriend and I had unprotected sex.. but the next day i got my period. Lately my stomachs been feeling off (and I’ve had this weird gut feeling) but I’ve been holding off taking a pregnancy test because of the fact that i got my period the next day... today i had pooped (TMI i know sorry) and it smelled like baby poop (if you’ve changed a diaper you know what that smells like) .. long story short, should i buy a test ?