Hi i had unprotected sex (per usual) with my gf a month ago, a few days after, she experienced sudden bladder pain along with tightness in her urethra and burning sensation when peeing. She was diagnosed with having a uti, so she was put on Cipro. Everytjing cleared up but several days later, the tightness and ugre to pee came back . A month later and another round at Cipro, symptoms still there. Culture revealed no trace of bacteria...what is causing this urethra pain?