Welcome to Neurotalk:

Long posts are okay. But I have some further questions.

Does anyone in your family have Ehlers? Anyone in your family with neuropathy?

CRPS (also called RSD) follows a trauma usually. We have a forum for it also and you can ask questions there too.

Were you using any drugs before this happened? Anything? Antibiotics? What were you doing when the pain started?
Athletics? trauma, accident? Vaccines, illnesses?
Were you exposed to solvents, chemicals, pesticides?

Have you been tested for heavy metals? Did you ever have B12 tested before you started it, to see if you were low?
If you are taking B12 now, you need to take it on an empty stomach.

Mayo has not been great for PNers over the years. The RSD (CRPS) is another matter. I am sure others here will chime in with doctor suggestions that they know are good. Discoloration is suggestive of CRPS.... intolerance to ice packs or cold also suggestive. CRPS patients like warmth and heat on their painful
areas.

This is our RSD forum:
http://neurotalk.psychcentral.com/forum21.html

They have an introduction thread here:
http://neurotalk.psychcentral.com/thread10725.html
You might want to post on this intro thread also so that the experienced RSDers can comment and give you ideas.