After testing for different causes, I am very sure that thyroid and cortisol deficiency caused my CFS. Just wanted to throw that out there - be sure to test your blood!
how do you know you had a thyroid and cortisol deficiency? Which tests did you get?
The standard thyroid tests are TSH, if they comes back normal then no more testing occurrs, it is called a thyroid cascade. Turns out, I had a pretty good doctor in that I told him which tests I wanted and he'd do it. For my thyroid panel I got: TSH, free and total T3, free and total T4, rT3, anti-TPO ab, anti-Tg ab, anti-Trab.
I don't know much about cortisol other than I paid $200 for a test which told me what I already knew which was I was tired in the morning and could stay up later than normal nightly.