What Causes Tachycardia, Weight Loss, Tingling Arms And Legs, Palpitations And Shoulder Pain?
Thyroid
Detailed Answer:
I am sorry to learn about your persistent symptoms. They seem very bothersome.
Although they sound like an uncontrolled overactive thyroid, the fact that the TSH is now normal, it is therefore extremely unlikely due to the thyroid condition.
There is another uncommon hormone related problem called Pheochromocytoma. I suggest you get checked out for that. A good way to start screening for this possibility is to do a blood test called
Plasma Free Metanephrines
This test does not require fasting and so it can be done at any time of the day.
Furthermore, whenever you check your thyroid with a TSH test, try to get a Free T4 blood test too. It is helpful.
If you have not had other routine labs like
CBC
CMP
HbA1c
done then it would be advisable to undergo these as well.
Follow up
Detailed Answer:
It is possible.