A good physician would welcome an intelligent question showing personal interest in ones own health and testing.

Not sure I see much autonomic problems in your symptoms, but I do see signs of Sjogren's...which I know you've considered and been tested for. I can't remember, have you had the lip biopsy?

The sweating, GI and heart arrhythmia (all depending on what it is exactly) could be autonomic. The skin biopsy does look at autonomic fibers as well, so maybe this will provide some useful information for you.

Hopefully soon you will have some answers. Please keep us posted.