Hello, I used to have Graves and did Radioactive Iodine treatment ( which afterwords while waiting for medication for a month, I began to have severe muscle aches and pains). Now 6 years later, my dose of Levothyroxine was too high and my TSH levels too high so my Endocrinologist took me off my medication. But now I have SEVERE lower back pain for 4 days now. Should I start taking my pill again. ( further info- I dont really exercise, Im not over weight, im on Birth Control, Im 24 years old) Thank you !