My body was having a hard time regulating my body temperature because the adrenals were stressed. I have noticed if I start slacking on my supplements, the hot flashes try to come back.
So many people I know have worn their adrenals out. It has been the American way. We may sometimes get to a point in life where we are not living that stressful industrial nation life but we have to build those adrenals back up to function with any sort of energy.
If you are fatigued, tired, low energy and/or have hot flashes and can't sleep, you may want to check your adrenals. There is testing for adrenals and if they are low there are many sources to get good- quality supplements for bringing your adrenal levels back up where they should be.