I'm sure by now that you have heard that your temp. is regulated by the automatic nervous system. I have a similar problem with my balance also caused by autonomic nervous system. My was started by Sjogren's which an autoimmune disease. A specialist to start with would be a rheumatologist that knows about Sjogren's (they don't all). The only treatment for Sjogren's at this time ( there are drugs in the works) is IvIg. I hope this has given you a new place to look. Hang in there. We care!