You are doing the right thing with testing and seeing multiple specialists.

Did you ever have any actual "trauma" to any part of your body before these symptoms started?

This sounds like it could be something other than CRPS in my opinion. But as we're not doctors, keep at it until you get a diagnosis that fits and is solid. And a treatment plan to match. I'd be certainly interested to see what that Rheumatologist has to say....

Good luck and keep us updated!