Hello, over the past week ive had urinary pain and burning. Ive gone to urgent care and urine had no bacteria. I was prescribed nitrofurantoin and it did not help long term, pain continued. Felt relief for a while but pain did not go away. I noticed I started feeling an itchy feeling down there and my head had a rash / red discoloration that seemed irritated. Went back to another urgent care and was provided medication for a yeast infection. This seemed to really help. Was told on the third day to take the second pill if needed. Im on my second day and the burning is back just as strong as before. Do utis really last this long to heal? Should I be worried its something else? Please note im only sexually active with my wife.