
I've had my thyroid function checked loads of times and every time it's OK... ME can give all the symptoms without any diagnostic tests revealing anything...
And still I suffer the cold terribly and out of all proportion to the general population

And be aware of a Vitamin D deficiency too... That can cause all kinds of related problems and most residents of the UK are deficient.. One supplement all should take in the duller months...
In fact, go for a good multivitamin/mineral supplement and see if things improve...