Urethera Inflamed. Had UTI 6wks Ago. Have Had Recurrent Yeast

Urethera inflamed. had UTI 6wks ago. Have had recurrent yeast infections. Vaginal pain & pain urinating. Many urine tests keep coming back negative. Continued tongling feeling from belly button down to urethera. Gun sent me to urologist. Had scope in office. Extreme pain during catheter insertion. Dr could see an irritated area. Sent me for an X-ray with dye of my bladder/kidneys. Excruciating pain during cath.insertion. In humane & traumatic. No significant findings. Why am I so inflamed??