Hi I am a 42 year old female and My body temp is fluctuating The past few days , I have been sweating bad at night during sleep and am expecting my period but haven t got it yet, it can come at very different times of the month, I also have mixed connective tissue disorder, had a positive ana for many years but have been negative for the past two , I see a rhumetologist regularly, have an appt, next week and am pretty aware of my body , exercise regularly just not sure whats going on was hoping to find a few suggestions on whats happening