Hi PJ,
You say you awaken during the night? How often does this happen? Is it over a bad dream or are you waking up to use the bathroom?
I am just wondering because if you are waking up a lot you may have sleep apnea.. which is a breathing problem during deep sleep which can cause you to not feel completely rested.
I would talk with a medical doctor about the sleepiness/fatigue issue.
Missy