I am same....almost exactly. Reyanauds and Erythromelalgia.
I have had the chilblains as well. I exacerbated the issue by trying to warm myself in a hot tub, immersing my feet as well. That is a bad idea. The blood will pump into the digits, then cannot return. The only thing that’s had helped me though it was to protect the ends of the toes with silicone toe caps.....and do not immerse feet in hot water. Baby bottle warm at the most.
This post won’t let me link to a website, but just do a web search for “silicone toe protectors” .

Good luck.
PS...I’ve also used them at night with a little healing cream on the ends of the toes (polysporin...if you know what that is).