I've had me/CFS for nearly 5 years and just got my annual blood test results back.
I'm not 100% convinced that there's not a problem with my thyroid despite results being in the normal range. I've also developed a goitre on one side of my thyroid in the last few years. It's had a needle biopsy and all fine so they're going to leave it unless it grows too big.
I've always been freezing cold since I've been a child. My fingers are often blue as soon as the temperature drops even a degree in the summer. I've also got the hideous fatigue and pain - hence CFS/me/fibromyalgia diagnosis
The photo shows my test results over the last few years so you can see for comparison.
I've also been taking 3000iu vit d for the last year along with a high strength multi vitamin and a sublingual vit b12 for three last three years. The b12 is slowly going up.
Any insight from you wonderfully knowledgeable people? 
(Also posted in autoimmune board but not sure how much traffic it gets)