Q. A 28-year-old woman presents to your primary care clinic with complaints of persistent urinary symptoms despite completing a course of antibiotics for a urinary tract infection (UTI). She reports a burning sensation during urination, frequent urination, and lower abdominal pain. Nitrofurantoin was prescribed. But even after 5 days of treatment, she is not relieved from symptoms. Her temperature is 99.6°F (37.5°C), pulse is 90 beats per minute, blood pressure is 120/80 mmHg, and respiratory rate is 14 per minute. Physical examination shows mild suprapubic tenderness. What is the most appropriate next step in the management of this patient?