I had a very odd thing happen that has never happened to me before.  At 72 degrees I was sitting watching a football game completely comfortable for several hours.  All of a sudden, I was very cold.  After several hours and dinner, I was back to normal.  Normally I can spend several hours outside at 50 degrees without a coat and without getting cold.  Why did I get so cold at 72 degrees?
Such a phenomenon may have several reasons. If you were not feeling feverish at that time then fever related reasons can be excluded. Sometimes such a sensation of cold may be subjective due to emotional factors. Certain medications may cause this sensation at times. If you feel unusually sensitive to cold and feel that you have been gaining weight or feel sluggish you may get a Thyroid function test done for example TSH test. Best regards