Cfs or fibro is basically severe pain in muscles and excessive tiredness that cannot be explained.... and the medical experts really dont know how to differentiate or to establish medication for to be honest.
Have you had your vitamin d, thyroid and B12 levels tested.
I have been previously been diagnosed with a number of diseases that have grafually been wiped off my records as wrong... Pernicious anaemia, palindromic rheumatism and fibromyalgia. All of these changed to diabetic amotrophy... But without the EMG studys that should have been done.... So still waiting....
However, I can only add that I get chronic tiredness... Especially waking up, I get chronic pain but the more I do, the better I feel.
Reallly need to know a little more info before trying to help more....