UTI (please help)

Hi, so about 5 days ago I found out I had my first ever UTI, I’m 30 and have never had one and if I did I’m guessing it went away on its own without my knowledge.

Anyways, I called my doc and he prescribed me a 3 day supply of antibiotics. I took them and it’s now two days after I finished the antibiotics and I retested using AZO, it’s still positive. Is this normal or should I go in for another round of antibiotics?

Thank you for any advice!