UTI While Pregnant.

I was told that I STILL have a UTI after taking all the pills they prescribed me called Nitrofurantoin Mono-Mcr. So they sent me out a different prescription of antibiotics to my pharmacy, which I can’t get until Monday when they open. So she decided to give me a shot in the butt for the time being. (I forgot what the shot was called) Well I just went to use the restroom and notice this after urinating. Have anyone ever had this happen and it was because of the UTI?