Hi, my fiance is 23 years old. she is going through little stress as she has to work for 12-14 hours for a day. So from the last few days i have noticed that when she's sleeping at night , suddenly her body temperature gets too high and she starts feeling cold. But this is not in the morning , like she is absolutely fine when se wakes up in the morning.This is happening from the last 10-12 days. Please suggest what should we do now?