I have had the constant urge to urinate for almost 2 weeks now- no burning or discharge, just constant unceasing urge to urinate that is unchanged by actually emptying my bladder. I saw a urologist who thinks it is urethritis, though I've never been sexually active, and thought all cultures are clear, coupled with a clear ultrasound and CT scan. I've been on Macrobid for about a week now, and haven't seen any improvement yet. Is there a chance it could be viral urethritis, or something else altogether? I'm very worried, as this is having quite an inconvenient effect on my life. Any help would be much appreciated.