A 32-year-old primigravida at 32 weeks of gestation presents to the labour ward with complaints of vaginal spotting and lower abdominal cramps for the past 6 hours. On examination, her cervix is 2 cm dilated, 80% effaced, and contractions are occurring every 5 minutes. Fetal heart rate is 140 bpm and reactive. She has no fever, and rupture of membranes has been ruled out. What is the most appropriate immediate next step in management?