I do not have a diagnosis of chronic fatigue. I don't think my dr believes that exists. However, I'm 63 and can tell you I have felt ongoing, chronic fatigue for 20 years. And it is disabling much of the time. Dr keeps up with all blood work including hormone levels, vitamin d and b, everything.i have hypothyroidism and have been treated for that for 34 years. Get vitamins b shots every month due to partial colectomy nearly 3 years ago. I am on medication for depression and anxiety -- generalized anxiety disorder and ptsd. Sleep dr thinks the high dose of temazepam at night is contributing to the central sleep apneas. I think he is probably right. I have no idea if this is playing into my hypoxia too. Will see my psychiatrist in August so he can help with a taper program.