I Had Sex With A Guy And A Few Days

I had sex with a guy and a few days later I went to the doctor took a pregnancy test and it was negative and the doctor said I was not pregnant but the reason why I went is we thought it was my appendix but then they found out that it was a uti so they gave me antibiotics they also did a ct scan and that's how they found out I had the infection and they showed me an xray and my kidneys and everything looked good so they gave me medicine for the infection which happened a month ago and I think I might be getting a uti again is it possible that it wasn't fully gone after the antibiotics were gone or what do you think it could be because my urine has been a little smelly and a little pain but not To much and I have been taking ibuprophen and drinking cranberry juice so what do you think could be happening or what do you think it could maybe be!?