Hi there.
Did the physician who prescribed you the
T3's give you a diagnosis? Your symptoms as stated don't stand out to me as being due to a specific condition, but I am missing large amounts of history, and a physical exam. If your armpits are tender to touch, you may want to have your physician check your lymph nodes in that area.
Be careful about taking narcotics for this pain- it does not sound like it is doing much to help, and they are quite addictive. If you don't have a diagnosis you could also be masking pain that would help in making a diagnosis.
I suggest you see your doctor for a comprehensive check and any appropriate testing, and discontinue the T3s unless they were prescribed by your doctor specifically for this condition.
Good luck,
JMK MD