Your thyroid has big problems if your body temp is below normal. That is all you need to know. You take Iodine (or Natural Dessicated Thyroid Hormone until your body temp is normal. You can drive yourself crazy worrying about blood test numbers. The numbers and your thyroid will take care of itself when supplied with Iodine and selenium.
To look at this in a different light, the testing numbers get screwed up because of the toxins of fluoride, bromide & chlorine. So don't look at the numbers and focus on body temp instead.