A 30-year-old presents to the emergency room with bloody urine and dysuria of 12-hour duration and a sensation of incomplete voiding.

A 30-year-old presents to the emergency room with bloody urine and dysuria of 12-hour duration and a sensation of incomplete voiding. She was recently married and has never had similar symptoms. She otherwise looks healthy and denies chills and fever. On physical examination she looks a little uncomfortable but is afebrile, has normal vital signs, and has mild tenderness in the midline above the pubis. Her urinalysis shows too many to count (TNTC) red blood cells. Diagnosis: Urinary Tract Infection and Possible Pregnancy