Re: Maybe it's the Cytomel?
My Aunt started with 50 mcgs 2 weeks after her RAI and then bumped it 25 mcgs a week to 100 mcgs. Then at six weeks they tested her levels. They wiggled about to 150 mcgs of T4.. then backed off there and added cytomel.. no good for her.. then they went to straight Armour.. better but too much T3. In the end she ended up with 75 mcgs of T4 and 1 grain of Armour. The key she and her ENT/Endo/IM team determined was to go titrate up in a staggered fashion. They do not have good results with a sudden hormonal dump like a flat 150 T4 or such. The most they started someone at was 100 mcgs of T4. Then tested and moved on in four weeks. It sounds like they may be flooding your system and sending it into overdrive.
If we learn by our mistakes, I am working on one hell of an education.