I have had the EXACT same experience, save I am a male.... Since childhood my body temp has risen SUBSTANTIALLY at night, often causing my wife to scoot close in the winter and away in summer. I have done extensive research on this without garnering any real help as most issues seem to be related to other problems.
I have noticed that my Father, Brother and Sons (no sister or Aunt to test) all have the same physiological response while sleeping - independent of their external environment, diet, mood or emotional situation, age, geographical location, body fat content and MOST IMPORTANT - Independent of any secondary health problems!
After years of investigation and medical discussions I have come to the educated conclusion that the trait of a raised temperature during a persons sleep can be attributed to a genetic difference. I have a substantial (50%) amount of Native American heritage in me - my father being 100% and my son's 25%. (alaskan native.)
I believe that this is nothing more than a regressive gene that has yet to be identified. However, I am speaking specifically about Britwhit and my own experiences - from childhood on - I would NOT think this about a case with a person that suddenly develops these symptoms...
I am actually quiet proud of the fact that I don't need a blanket in Alaska! That's saying something eh? Course....Global warming might make me quickly feel cursed in the years to come...
All my best!
Barry Littleton at yahoo electronic mail