I have been suffering from the chills, loss of appitite, and clamy palms for 3 days. It seems to come in waves. I had initially thought that I was coming down with the flu, however no other symptoms developed. I was unable to take my temperature (no thermometer) but assumed that I must have a fever. To my surprise, once I obtained a thermometer, my temperature is registering 96.5 to 97. What would cause a low temperature?