My Mom passed away from Rheumatoid vsculitis, she was not diagnosed till she was 80 years old and had big open sores on her ankle and legs but every doctor even her Cardiologist told her "you;re just getting old" I demanded they test her for Autoimmune disease and 2 weeks later she had a diagnosis and high doses of Prednisone but passed away a few months after. Now I am having the same symptoms, burning legs, insomnia, chest pain and horrible depression but my Rheumatologist is hesitant to give a complete diagnosis, I have RA and Sjogrens too and all the medicine I've tried made me sick, good luck with getting fast answers but I wish you well.