I've dealing with this most of my life, I become very thirsty, as in unquenchable, and then I cannot sleep. The only thing that helps is bed rest. I am type 2 diabetic and my AC1 is now in the pre-d range. Whenever I work out or work too hard, it hits me. My body reacts quickly to exercise and I become ripped easily but this appears to cause issues, possibly setting off a diabetic reaction or possibly allowing a virus to attack? I was also diagnosed with chronic Epstein bar virus (first time in high school during wrestling season) which goes away with, again, bed rest.