Breathing

Tonight, I again had trouble breathing when I went to bed. Just as I fall asleep, I wake up not breathing, my heart beating fast, adrenaline flowing. This happened 3 times before I finally fell asleep. It happened a couple of nights in a row last week too. Wonder if it has anything to do with a much-lowered dose of prednisone? As of today, I am down to 2.5 mg day.