So you're a fence sitter? Well nice to meet you anyway. I was only dxed in mid June and my test shows early stage. I had a flare that lasted over 7 months though, and I have to say if that was early stage I really hope this thing doesn't progress with me quickly. I had extreme pain in joints, especially lower extremities, pericarditis, and pluerisy. It was no fun at all.
To address the lymph nodes, these are a primary part of you immune system. Since these things are caused from a hyperactive immune system, it seems to me that the lymph nodes would certainly be involved. If you read the literature on the subject, the lymph system is involved with all of these autoimmune things.
I also have Hashimoto's Thyroiditis and when my thyroxine isn't right my lympth nodes can swell too. I do wonder why almost 94% of people affected by autoimmune diseases are women.
Take good care of yourself and I hope you feel better soon.
May God Bless You