I'm sorry to say that this isn't a rehab answer, my best friend had me/ chronic fatigue for years, I don't think this is a rehab question but a systemic one. She did eventually recover, but it included changing her diet, finding out her food allergies, detoxing regularly and counselling. She however will always have to keep a tight check on her health habits and energy expenditure, she gets tired a lot quicker and overdoing it can cause her to slip back into it.