Is it possible?

Had sex on Sept 29 and Oct 2 (both with condoms) and had my period on Oct 11 (a day earlier than predicted by this app). It seemed like my normal period, 1st two days normal to heavy flow, then it tapered off. After my period I started having symptoms of UTI. I was given antibiotics and I finished the meds yesterday but I’m still peeing more than the usual (like every hour or so I feel the need to pee). I also got tested for STIs (since I had a new partner) but no word from my doctor yet on the results. It is unlikely than I’m pregnant, right? Sorry just overthinking 😣