What do I do when I get hot flashes and crazy body temperature changes?

I know Im 18 but I've been experiencing these crazy things. Hot flashes and crazy body temperature changes where it's like I'm either hot and burning or I get cold like the chills. It can't be my thyroid because my low functioning thyroid (hypothyroidism) is controlled with a med for it that I take every morning. My thyroid is fine and I even got it checked kinda recently, discussed it with my endocrinologist and primary care doctor and it's fine. But these body temperature things are so unusual and it drives me crazy too.
What do I do when I get hot flashes and crazy body temperature changes?
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