You should look into hypopituitary. You have below range frees, with low TSH.
There ought to be bells going off everywhere!
T3 uptake is a useless test, and Total T4 doesn't mean anything either without a thyroglobulin level. (But why waste $$$ on those when you can do a Free T4, which is what Total and thyroglobulin allow you to calculate?)
Ideally, you want your T4 AND T4 at the top end of your range-the Free T3 range used to go up to 6.5, but as people have gotten more and more hypo, the range has slowly dropped. AGain, it's nothing but a statistical figure. Nothing at all to do with optimal function.
If you have hypo symptoms, you have hypo symptoms, regardless of your blood tests. Have you checked Ferritin? Iodine saturation? B12? Vitamin D? Selenium? Vitamin A? RBC Magnesium?
stopthethyroidmadness dot com is a good website as well as RTH; I'm over at RTH too. :-) Different name though.
You would probably be wise to see if you could get an AM cortisol level + serum ACTH checked too. Have you any history of mononucleosis, concussion (or a blow to the head enough to make you see stars?), other causes:falling down the stairs while a little kid (it doesn't have to be adult onset), whiplash, hemorrhage or whiplash while pregnant or nursing, "idiopathic source", and I sure there are others that are not identified.
There are pituitary autoantibodies as well, sort of the equivalent of type one diabetes, only with the pit. Your body destroys the gland. But there are no clinical tests for that, only for research.
Chief cook & bottle washer for one kid, a dog, 6 hens, 2 surprise! roosters, two horses, and a random 'herd' of quail.
~The ultimate ignorance is the rejection of something one knows nothing about and refuses to investigate~