Last couple of days, I woke up middle of the night sweating heavily and shivering from cold. The room temperature was around 26 - 28 degrees Celsius and I was using a thin blanket. Before sleep, both the days, 1) I had food, 2) I was very tired, 3) took bath before sleeping. This never happened to me before. Could you please tell me what made me feel sweating and shivering at the same time ? I also found that my heart rate was 93 bits/minute yesterday and my sleep was not very refreshing... please advice