As you see, your description of the fatigue resonates with many. But I'd say you are lucky in one respect: my fatigue usually creeps up over a week so that I slowly fall into a regime of constant napping and tiredness. This makes it hard for me to identify when that autoimmune chronic bone-deep fatigue has set in. Only when I begin to climb out of the funk do I realize I have, once again, been in a Hughes Fatigue Funk. So if your funk has sudden onset, that increases the chance you will be able to identify a trigger and a solution. A virus because you inhaled at the wrong moment on the bus? A food you don't realize you are sensitive to? Aggravated stress at work or home? (Yoga helps, or just time with Bach on a good head set.) Good luck. And (my Hughes/ APLS slogan: "That which does not kill me gives me more information about how to deal with this."