MCTD Support Group
Mixed connective tissue disease (MCTD) or Sharp's syndrome is a human autoimmune disease in which the immune system attacks the body. MCTD combines features of polymyositis, systemic lupus erythematosus, and systemic scleroderma and is thus considered an overlap syndrome. MCTD commonly causes joint pain/swelling, Raynaud phenomenon, muscle inflammation, and scarring of...

Jen - good luck with your testing & firm diagnosis! Have you any treatments/remedies that allay your symptoms?
Terribly debilitating disease isn't it?
I have been taking B6 for over a year and it has helped substantially. Also, I use a heating pad on my hands and feet, if I start to get the tingling.
Give those a try. What do you have to lose?