Hello, welcome to Connect. I often wake up thirsty, usually it means that my sugar is high. I am a type 2 diabetic. I am not a doctor, so I can only tell you what happens to me. I have the same type of crashes you are describing--I usually eat wheat bread instead of white and that has helped, and I try to lay off of the simple sugars/carbs as much as possible (things like: cookies, crackers, candy, white bread, potatoes, noodles, and chips). Even cutting back on those things should help you. When I manage to cut back on those foods, I feel much better--when I don't, look out!!!!! God Bless and best of luck to you!!!!!