just bloating? or something else

so the last time I had sex was about 2 almost 3 weeks ago and we used a condom and i’ve been on the pill since june, i’m pretty sure he pulled out as well but i’ve been feeling like my stomach looks more bloated than usual?? I took a urine pregnancy test from a lab on friday (the 5th) and it was negative and my period came the following sunday. it was pretty normal but there is barely any bleeding now. I still think my lower stomach looks more bloated than normal and is it just because my period is still technically finishing off or should I be worried ???