Last night (middle of the night of course) I began having severe cold chills. My husband put 3 blankets, heated a warm towel for me, AND put the electric blanket on. I was not running a fever. Then I began a coughing fit that I could not control. My chest is sore from all the coughing but other than that I am back to normal. No chills and no coughing today. Heart problems don't actually run in my family but strokes seem to. Any ideas on what it may have been. I am a 63 year old woman who walks daily, don't smoke, and try to eat right. I have never experienced anything like this. Thank you for your time.