Legz - I really don't know what would help. You can try an ice pack and see what happens. Ice is good for nerve conduction. When I start getting those back spasms, I use ice and it seems to help. Some nights I go to bed with an ice pack (well, actually a couple) on my back. I lay on my side, prop the ice packs up using pillows and lay against them.

Hope you start feeling better soon.