I'm so sorry to read about all of your pain.
13 Magickal Moons has a great legal matters spell kit which has been extremely successful for many people.
Dorothy Morrison also has a fantastic spell in her book Utterly Wicked.
You might also want to look into crystal healing and Reiki, which is a form of energy healing. Both of these could help you manage your pain, and both would work well with any current methods doctors are using to treat you.
Best of luck, hon!