If your RSD spread, how fast? How much? Anyone have their RSD spread a LOT overnight or in a short period of time?

Thanks... my RSD spread overnight to both of my feet and legs, after I have had RSD in both of my arms/ shouders. It started in my right side, then in early Dec. it moved to my other arm/ shoulder, and now, late Jan. it has spread to BOTH feet and legs.

Thanks for the help and your experience in this.