Megs, I'm so sorry you are going through so much all at once. As Billye said, autoimmune diseases do tend to go together. I had Graves' Disease, and now have Myasthenia Gravis. Have you got a good rheumy that you trust? That will go a long way toward relieving the anxieties. I've got a good friend that has RA, hers was brought under control by steroids. I forget just exactly which she was taking. But she's been weaned off them for a year now, and doing good.
Come and post anytime, and keep us updated on your progress and treatment.
Hugs,