A 28-year-old primigravida at 32 weeks gestation presents to the emergency department with sudden-onset severe abdominal pain and vaginal bleeding. She has a history of poorly controlled hypertension (BP 160/100 mmHg today). On examination, the uterus is tender and woody hard. Fetal heart rate is 90 bpm. Ultrasound shows a retroplacental hematoma. Her hemoglobin is 8.5 g/dL (baseline 11.2 g/dL), platelet count 95,000/μL, and fibrinogen 180 mg/dL. What is the most appropriate next step in management?