I'm literally sitting at Mayo Clinic right now basically in the same situation, chronic everything, unexplainable illness, even had the same experience with a rheumatologist this summer. I've got fibromyalgia, 6 confirmed autoimmune diseases and the got my 15th concussion(classified as Severe Traumatic Brain Injury) in June and a whole bunch of other nightmares but for the first time I have hope and here they listen, they look at the whole picture and you get a team, yes a whole team of doctors working together to sort things out. It's not easy getting insurance to let you come but i promise it's worth it, plus if you call them enough they'll do just about anything to make you stop.