pain, burning, tremors

I injured my L shouder in March, pulled shoulder and neck muscles on L side,  My fingers went numb and tingly, and my neck and shoulder and down the L side of my upper back...burned so bad.   An MRI found damage to my C-6 and 7 vertebra, disc bulging and pressing into spinal cord, I have really bad head aches sometimes. I also have tremors in my L hand and arm to variable degrees.......HOW can pulling muscles do this?