I am a 40 year old woman, 5 4 , approx 200 lbs. For the last 30 days, I have had a low-grade fever that doesn t seem to respond to medications. Anytime I do any physical activity (even laundry), I feel worse and start sweating. Lately, I ve been nauseated when active, but gets better if I rest. My body feels like it s on fire, but my hands will be cold to the touch.