Thanks for replying Pete, Eileen, Mark and Frank.
Yes, my otherwise stellar medical team did drop the ball by not getting me a pre radiation TSH level but that was then and this is now. My number squeaks into "normal" under the old regime but is high under the proposed new one, hence my questions.
I see my ENT next week and will share any info.
Bottom line is that I just wanted to have a heads up awareness. I don't really have any symptoms except feeling being much colder than preTX. I used to have a raging metabolism and wear just shorts and T shirts thru even winter months in the house and suffer all summer. Now I am sitting here in a 72degree house wearing three layers. Hard to tell though whether this is a function of having lost almost all my body fat, dropping from 177 pounds to 130 and now stablized at 137. I look great in the mirror, totally flat abs (up to a 2 pack already) with muscular arms. But then I looked like that in my marathon running days a quarter of a century ago - but I was warm them.
Actually easier to deal with summer this year than ever before.
Still as long as the fatigue does not come back and my energy level stays up for gym classes 6 days a week and house chores, I want to avoid any more medications.
Thanks again for sharing the info and experiences.