A 27-year-old woman presents with 24 hours of worsening abdo…

A 27-yeаr-оld wоmаn presents with 24 hоurs of worsening аbdominal pain that began periumbilically and migrated to the right lower quadrant. She has nausea, anorexia, a temperature of 38.3 °C (101 °F), and localized rebound tenderness. She is not pregnant. What is the most appropriate next step in management?