There is some evidence that CRPS/RSD can be associated with elevated ANA titres (http://www.hindawi.com/journals/mi/2015/718201/) though this does not seem to apply to you.

There is also evidence that people with CRPS/RSD often have autoantibodies specific for components of the autonomic nervous system (http://www.thblack.com/links/RSD/Aut...eDisordREV.pdf,

I hope that this will be of some help in asking your health care team informed questions.