Karla, I have a pretty good feeling that it's your thyroid, but it's definitely worth checking with your Dr.
However, I've definitely gone from being someone who sweated in the snow to someone who is freezing most of the time (though not this summer!
). It's something else to lose over 100 pounds of 'insulation'...it makes a major difference! I actually wore turtlenecks this winter!
And in the summer, I'm much more comfortable. All around, it's a good thing.