Dear South,
I am so sorry you are in so much pain. I did want to tell you that the brand "Sunbeam" makes a whole array of heating pads. Mine is just over 2 feet long. It makes a world of difference when it can start at your tail bone and go all the way up to the base of your skull. It is nice for my hips as well because I can wrap it around my hips and back together. Just a thought.
I do hope you get to feeling at least a little bit better!
*hugg*
dani