I can relate to your situation. I am a 57 year old woman who has been on 175 MCG of Levothyroxin for some 20 years. Recently, my dose was lessened to 150 MCG. In the 20 years, my hair thinned greatly, my heart raced and my weight has never gone down to where it was before diagnosis. I asked my doctor to let me try Cytomel, and he agreed and prescribed 50 MCG daily. My heart doesn't race and flutter with this new med. It is a LOT more expensive, but I'm going to give it a try for a year and see what happens. Sometimes, I think doctors just keep prescribing the same old things, but after 20 years, I'd think more improvement should have been seen.
I learned of Cytomel thru the internet.
Good luck.
One thing that is clear -- you can never stop thyroid meds again. There are sometimes however, when stopping the medication works out, but not in your case. Luckily you had the levels rechecked, it will take 2-3 months to re-stabilize the thyroid, but there is not likely any long-term damage that has been done.