Review Question - QID 108744

A 37-year-old G1P1001 woman presents for her 6-week postpartum visit after delivering a male infant by spontaneous vaginal delivery at 41 weeks and 5 days of gestation. She notes that 5 days ago, her right breast began to hurt and the skin near her nipple turned red. She also states that she has felt feverish and generally achy for 2 days but thought she was just sleep deprived. The patient’s son has been having difficulty latching for the last 2 weeks and has begun receiving formula in addition to breast milk. She is generally healthy with no past medical history but has smoked half a pack of cigarettes per day for the last 15 years. Her mother died from breast cancer at the age of 62 and her father has hypertension and coronary artery disease. At this visit, her temperature is 100.6° F (38.1° C), blood pressure is 116/73 mmHg, pulse is 80/min, and respirations are 14/min. She appears tired and has a slightly flat affect. Examination reveals a 4x4 cm area of erythema on the lateral aspect near the nipple on the right breast. In the center of this area, there is a fluctuant, tender mass that measures 2x2 cm. The overlying skin is intact. The remainder of her exam is unremarkable. Which of the following is the most appropriate next step in management?