Oh my, Nancy! You are as far from being a "quitter" as it only gets. :) You have been incredibly brave throughout all this unimaginable suffering. I say trust your intuition. *The* most important thing is now to stabilise. If you feel that the drug you take helps you feel better, just go for it. Do *not* put on yourself too much pressure. After so many years on drugs you need time to taper off of them. And you will start taking care of it *after* you stabilise. That is of an utmost priority now.
The VERY good news is that your body seems to respond well to the reinstatement. There's no doubt that, with time, step by step, you will be able to heal both from the drugs and your injury.