Q. An 18-year-old woman comes to the physician’s office for painful urination, urinary frequency, and abdominal pain for the past 2 days. She doesn’t have a fever or abnormal vaginal discharge. She also says that all the symptoms started 1 week after her first sexual intercourse with her boyfriend and she had used a diaphragm for contraception. Her menstrual periods are regular. She is not on any medication and has no known allergies. Her temperature is 98.6°F (37°C), pulse is 82/min, blood pressure is 110/80 mmHg, and respirations are 14/min. Physical examination shows mild suprapubic tenderness without guarding or rigidity. The rest of the examination is unremarkable. What is the best next step in her management?