I , too, have chronic fatigue, have had it 3 years now.
I take really good care of myself (most of the time), eat well, do liver flushes, take supps etc. and I am still fatigued too.
In my case, I think I have an infection in my sinus that my immune system cannot get too and will require surgery.
You mentioned mercury, have you had your fillings out and root canals out and cavitations cleaned?