Hot flashes at 22??

ive been getting hot flashes like crazy. it will be cold and rainy and ill be sweating with a fan on me..ill wake up drenched in sweat but shivering like crazy because I'm cold and wet. it happens randomly throughout the day pretty much everyday thing. really sucks..does anyone have any idea what could be causing this? I'm 22 years old, I exercise but not often since I feel like I'm overheating my body. my skin get extremely hot you can have your hand 4 inches away and feeel my skin radiating the heat. I have a dr appointment next week but this is really bugging me!
Hot flashes at 22??
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