kind of the same thing is happening to me. Debilitating mid back spasms, except mine are mainly on the left side. The worst ones are up and down the long muscles to the left of the spine, but they spread. I cannot hold myself up when it happens. My left arm will barely lift, but lifting it makes the spasms worse. I have a few supposedly minor issues with my spine. I am using Tizanidine and Tylenol with a prednisone pack when I feel it coming on - about every two weeks at the moment. I am also doing PT, but some of the exercises bring the spasms on. My therapist works hard to find alternate exercises. I also, just out of luck, found a therapeutic massage therapist that seems to help a lot. We just started, so I do not know for sure.

This is a horrible thing to happen. I am sorry you are going through this. Is it still happening? If not, what worked?