Hey! I'm not in the same situation as you, but I do take coumadin... So I thought I might share my experience with it.
Every since I have started taking coumadin, I have been very hot... All the time. It could be snowing out, and i'm hot!
I know 2 other people who are taking coumadin, and they have told me that they also feel hot at times.
Though I have never talked to a doctor about this, i'm guessing that the hotness, may be a side effect of, or is associated with coumadin.
Hoe long have you been taking the coumadin? Is it a new drug for you?
~qriosity~