Good morning Kat!
I have the same problem as you, except my pain has not gone down my arm yet. I don't remember all of your spine problems, but it may be that you are having a cervical spine problem. Have you had an MRI done on it? PT may be a suggestion for you, but do see your Dr first before starting any self treatment.
The only thing that has helped me is an epidural, but really not all that effective the last time I got one. Do you have one of the small Ten's units?...might give that a try.
My spasm moves around as well, but stays in the general area of the shoulder. I feel like just hanging it, and letting it droop for some relief...is yours the same?
Take care, and hope you get to feeling better.
Moderator Chronic Pain Forum
"Snowflakes are one of nature's most fragile things, but just look at what they can do when they stick together"