Thanks for the feedback, both of you. Btw, my doc won't test for T3 and T4 because the TSH was negative in his view.
As for how I feel, I do have very dry skin, get cold a lot and lately am having a much harder time losing weight. But I am rarely tired and definitely don't have anything resembling constipation. ("Rapid transit system" my doc calls it...) So I never really thought thyroid was an issue until people told me the 2.6 wasn't great. Ksee, any other specifics that come to mind would be great.
Do you have a diagnosis that involves the endocrine system or the thyroid? Are you on thyroid replacements? I can't offer any insight about that number without knowing a lot more and even then, in the face of a Celiac diagnosis, your symptoms may have some overlap.
My best advise is how do you feel? How do you see yourself? Do you think of yourself as a well person with a manageable medical condition or do you see yourself as sick?
If you feel well except for a worry because of a number someone told you is wrong, I think you should continue by working on diet and exercise for now. You can always reassess your situation if things change.
If you see yourself as impaired or sick, or if you think you should be doing better, I would suggest two things. First, tell your doctor that despite treatment, you feel sick. If the doctor doesn't give that the attention you feel it should, the next step is getting another opinion. Don't ask your current doctor to refer you to one of his buddies who will only back him up, but find another doctor by whatever means you have, gather any records needed and get a different point of view.
You always have the right to ask questions until you get satisfactory answers.