Welcome to YT! I'm sorry you found us under these circumstances.
What did your vet say about the results you were given? What is her recommended course of treatment?
My only comment on your lab work is that for a better understanding of the thyroid, you need an expanded panel. That is a blood test that looks at different T components.
www.hemopet.org is very knowledgeable and recommend the "gold standard" testing. Also Dr Jean Dodds is very helpful if you want to send her an email with a brief medical history,including your lab results.. There is a lot of information on her website about thyroid problems.
I hope that your boy heals quickly.