severe fatigue and the other problems you listed are typically from a highly toxic body, if theres lots of toxins circulating in the bloodstream your body will have no energy. Did you take vaccines as a kid? Id suggest reading Andreas Mortiz's amazing liver flush, and read up on organic sulfur, iodine, mms, and zeolite to detox.
I have had a lot of fatigue in my life as well (not nearly as much as you, but much more than normal). Detoxing plus changing to an organic vegan diet are what eventually turned things around. When Im not taking tons of detoxifiers I now can easily get away with under 7 hours of sleep a night with excellent energy.