Hi Elaine,
Mostly I am freezing (almost all the time), however I often get night sweats, so bad I though once I had peed the bed! I found that it was worse when I was on higher doses of cortison. Since the medications have kept everything quiet it hasn't been so bad. I still am always cold. However in a flare I often get a fever (39° C) and then I am freezing with chills and uncontollable shivering, and dripping in sweat.
Have you had your thyroid checked?
Have you made any lifestyle changes (smoking, medications, eating)?
these symptoms are indicative of a problem with the metabolism/autonomic nervous system)
When your GP doesn't know what to do, he should send you to an endocrinologist (neuroendocrinologist).
Good luck
Monique
PS dress in multiple light layer (so you can put on/take off as needed) also cotton as it keeps warm, absorbs excess moisture, and is also cool.