CRPS is the worst, isn't it? Then, the fibromyalgia on top, or is it? I see so many people with both, and I read an article earlier today that talked about pain studies (this outfit is in Australia, fwiw). They are studying the brain, and have, among other things, linked the frontal cortex and GABA and, they talked about how cognitive is affected by CRPS, which is my experience, too.
I just really often do think CRPS and Fibromyalgia are linked, it all goes to the spine and the brain, and because so much is unknown, we do get really varied responses from various doctors.
One of my doctors said patients often know more about the disease and the symptoms because we talk to each other so much, and doctors could learn from the busy bees among us, lol....(scary, isn't it....we just dont know enough about this dreadful disease!)