If you sustain the abnormal rhythm go back to hospital,
metoprolol can only do so much. You might also need a
blood thinner to prevent a clot in your heart, which happens with both afib and aflutter. You could see if you can get an appointment with your PCP before hand and see what they say, but again if you start maintaining that irregular rhythm go to the ED. Maybe you need another medication or last resort an ablation. Goodluck, keeps us updated!