Every post I read had a good idea or two, and I'm certainly not qualified to offer much of a diagnosis, but I'll just mention that 1-2% of us have sleep apnea. Most don't know it. My whole life I would sleep 9 hours a night and as I got past 40, it still wasn't enough. Now, with the diagnosis and treatment, I can survive fine on 6 hours, although 7 is good and 8 is heavenly. And my body is not giving itself that shot of adrenaline once a minute while I sleep in order to keep me from choking--a great health relief. Anyway, just a thought.