A 28-year-old primigravida delivered vaginally 3 days ago. She is exclusively breastfeeding her term infant. She now presents with severe bilateral breast pain, engorgement, and a low-grade fever (38.2°C). On examination, the breasts are tense, swollen, and tender but no localized fluctuance or erythema is noted. The infant is feeding well. What is the most appropriate next step in management?