Thanks for your comments, I've read them several times over by now. But I'm confused over your comment about increasing my dose of levothyroxine. I was heading along the path of thinking to reduce it or stop taking it due to my age being 77 years old. I believe the side effect of having hypothyroidism is a negative cardiac effect which I must be careful with.
My records of TSH/thyroid results before I went on any Synthroid were in 1999 thru 2001, with TSH results each of those years being 4.19, 3.21, and 4.56 (range being (0.3 - 5.7). I felt normal but my PCP said I was hypothyroid and to take the medication, When asked why I didn't feel and negative health results so far, he said I soon would. So he gradually increased my dose up from starting at 50 mcg in 2003 to by year 2021 getting to 150 mcg where I am now. Many years of data. I'll try to drop it in the lap of my endocrinologist and see if she wants to try anything.