Being hot natured has never changed, but late at night after sitting for a while, I noticed that I would and still can get chilled. During the day, while active, I am pretty much like I always was (Hot). I've kept the weight off for 2.5 years... It is NOT coming back this time I self medicated with food most of my life, since my ADD DX I just don't eat as much and stop when I'm full.

Iron may be part of this too. Has your doc checked your circulation and done blood work on you?