First let me say how sorry I am that this is all going on! I would be lying if I said I have never thought about killing myself, and I think most people on here would agree that they have also been there.
She need support from people that understand what she is going through. Can you maybe type what she wants to say, or maybe you could find a support group in your area.
I really don't have much else to say, I agree with Mike on getting her the ECT. If it does not help with the RSD maybe it will help with the depression.