well there isn't a hopeless case, especially not in our field of fatigue/brain fog etc...we're definitely within repair capability in 2013.
You have brain fog = you need to find out where, what part of the body/hormones/glands/organs are causing it = find the right doctor and treatment for it.
Also: I was hoping for many more responses. It would be really nice to know how long it took you people to develop your worst stages of fatigue.
For some ppl, it took like 2 years and they were bed-bound. Not my case at all, it's been 7 years of constant slope for me. And worsening daily now.
I haven't found anyone with that common aspect of the fatigue...