My urine also smelt very bad. Incidentally, I also had a major ulcer in my mouth inside lower lip
at the same time. These symptoms came a week after my friend had a big ulcer/sore on his lip and accidently coughed on my mouth. I never had UTI before that. Since March 2016, I have had UTI thrice which is very painful and is extremely burning. My urologist did urine test. The results showed negative culture and positive pus cells each time.