Good to see everyone posting test results.
Sadly doctors are now almost completely driven by results, rather than clinical symptoms, and the majority seem not to understand the difference between a test result being within range and being optimal.
For that reason, and that reason alone, I was diagnosed with CFS in 2010, when I actually had a serious ferritin deficiency, an equally serious vitamin D deficiency, low folate, low B12 and a failing thyroid.
Since then I have done a lot of research and now I am almost completely well. Had I accepted the initial diagnosis, I cannot imagine where I would be now.
To the poster with the TSH above range and FT4 in the bottom half of the reference range, you already have a thyroid problem, which will cause any number of symptoms. There's about 300 to choose from. The problem will be to get an NHS doctor to recognise it
To the poster with B12 under 300, you need to know that it needs to be over 500, and preferably a lot higher, to prevent permanent neurological damage.
It's dead easy to supplement, so you can do that yourself, but with a level that low, you do need to be checked for pernicious anaemia.
It seems that once you have a CFS/ME/fibro diagnosis, the medical profession blame everything on that diagnosis, whether it is related or not. Forensic examination of test results and taking responsibility for your own health can make a real difference.