Just a thought....Did you ever get checked for Celiac disease? This is an autoimmune disease which is an inability to digest gluten in wheat, rye, and barely. Celiac disease can mimic many other diseases, can cause sever constipation, and cause fibro type achiness among it's list of many symptoms. No one has all the symptoms, and some have idiosyncratic symptoms. For example, when I eat gluten, my intestines swell --one time, almost shut and in horrible pain -- in the ER the surgeon threatened to take out part of my intestine too. I had to "educate" him about Celiac disease. Not all doctors graduated at the top of their class!
Why don't you see how the Cytomel goes for a while - you may find that the added T3 now - could help rid those pesty symptoms.
You could see if you feel better trying a magnesium supplement too. Both the constipation and aches may get better with taking that.
A good range for TSH is somewhere between 0.8 and 1.8, depending on your body's natural set point.
A good range for your Free T3 is about two thirds up the scale that your lab uses.