There is more to this than t4 t3 tsh. The old tests were pulse rate resting and temperature. If these are off, you're too low.

Also you can show normal on t3 since there is a measurable anti t3 that prevents your body from using it. No one knows it.

And, you do need not to be low or mid range normal, that is actually never where a normal person is.

I'm finally feeling a little better and I can see how sick I was.

These doctors don't understand that thyroid replacement is not just a fancy med to feel better, we die if we don't take it. Would they want a person with diabetes to have such an uncontroled illness? It's a similar thing, just another hormone absolutely needed, just that the damage comes a bit faster.