Having hot flashes and getting really cold?

i have had those before when i was sick with a flu. My temperatures were really high and when i sat under a blanket. it didn't help much, but then later i felt really hot and sweaty and had to get out from under it. my doctor said that i would be better in a number of weeks, and i should stay warm even if i got heat flashes. if you are working you might try staying home and resting a few days, check your temperature, take NyQuil and sleep a lot.