Thank you Sr Sailor, can you please tell me why a cardiologist. I live in a small place I would have to get doctor approval to ship me out the check this and that is not so east where I live.
This is just speculation (!), but since you were outside for quite sometime in bitter cold, the sudden change in temperature might have upset your heart rhythm or your arteries/blood pressure. If you have no cardiologist nearby, I suggest you contact a 'regular' physician (GP).