Your symptoms suggest to me that a possibility for you to investigate is exposure to formaldehyde. I made a thread for this over on the Chronic Fatigue forum: www.healingwell.com/community/default.aspx?f=15&m=3786409
Some of what you are experiencing is similar to what I've been through, and even though you have a pre-existing condition, chemical exposure could be compounding your issues.
Unfortunately, those of us with autoimmune conditions can't usually rely upon most doctors who are available to us for quick diagnosis. Your key to finding answers also depends upon becoming your own advocate, and asking questions...like you are doing here.
I understand what you're going through, and I wish you the best!