So sorry you are going through so much! Are you taking Vit C to help with spread? 500 mg daily for 6 weeks. Are infusions of any kind an option at this point? Lidocaine or ketamine? You may also consider a two to three week round of oral steroids. That could really knock things down and isn't particularly risky.

I hope you find relief soon,
sending prayers and Healing Love,
Littlepaw