I have been on levoxyl for about 8-9 years now. I have an under a...

I have been on levoxyl for about 8-9 years now. I have an under active thyroid which I believe is from radiation over my neck area for benign tumors. I have been reading the side effects from people and I am starting to think that most of my symptoms or side effects are from this medication. Slowly over the years I have developed several of the same things people are talking about on this, especially restless leg syndrome, fatigue, chronic pain in legs, trouble sleeping, anxiety, lack of energy, cold feet/hands, lack of sex drive depression, b-12 deficiency, neck and back pain. I am talking to my doctor tomorrow and see if I can go on something else. I am being treated for all these other things that could all be related to the levoxyl side effects. I had none of these other things before taking this medication, what is going on?