I'm on 150 mg Pristiq since 9 sep now exp chills and sweats at night and early morning. Also have sleep apnea and using cpap which I find very uncomfortable. My question, will an increase in dose make it better or worse? Also seeing a counsellor due for second visit this week. I'm feeling lousy most of the time, teary, anxious and useless a lot of the time. Not sleeping well and nauseous in the morning. I'm 57 and had been on 150 Effexor for several years prior which had lost its effectiveness.