Sometimes wake up at night with avery dry mouth and cannot move my tongue until i drink something?

Mouth breather?: I would suspect you sleep with your mouth open. when we sleep we all produce less saliva but mouth breathing "drys out" the mouth more. If you snore, I suspect you may have sleep apnea and you are breathing with mouth open to try to keep your airway open (natural). If you are chronically fatigued I would see your doctor and ask about getting a sleep study. you could feel much better