A 46-year-old gravida 4 para 4 woman underwent posterior colporrhaphy approximately 3 weeks ago. She first noted passing of blood clots per rectum, approximately 3 days ago. She is now complaining of a foul-smelling vaginal discharge. She is otherwise healthy and denies fevers, chills, or other constitutional symptoms. What is the initial treatment recommendation for this condition? Is it low fiber and diphenoxylate or antibiotics and supplemental fiber