A 24 -year-old woman presents to the clinic with a 3-day history of burning micturition, frequency and suprapubic pain. She has no fever, nausea or vomiting. Examination reveals mild tenderness on the suprapubic area. There is no costovertebral angle tenderness. Urinalysis shows 20 leucocytes with no casts.
What is the next appropriate step of management?
A-Trimethoprim-sulfamethoxazole for 3 days
B-Penicillin and gentamicin for 7 days
C-Intravenous pyelography
D-CT scan of the pelvis
E-No treatment necessary and follow up in 3 days