Low body temperature. what should i do?

It depends: Acute drops in body temperature can be a sign of an acute illness or injury and you should be seen by a health care provider right away. If this is a chronic issue and you have no other symptoms, you may be someone who's temperature exists on the low end of normal. Either way, it would be worth discussing with a health care provider.

97: The normal temperature is 98.6 degrees. When a composite of people are examined it is found that temperature can rise or decrease about 1.5 degrees depending on time of day, activity, hormonal cycle etc.. It is found that 97 degrees is the lower limit and below this is hypothermia.