Can you please explain exactly what you are feeling when you get a hot flash. 71 is too old to be having hormonal hot flashes.
It is not a menopausal hot flash. Not possible. I would suggest seeing an endocrinologist as there are many other causes of flushing. YOu really need a full medical workup.
Hot flashes like this are often due to anxiety or panic type symptoms. It sounds like you are on the right track.