Suggest Treatment For Hot Flashes

I am a 19 year old woman, 5'4", I weigh 130 lbs. I've been waking up every morning for the past week and a bit, at 3am, extremely warm all over. I've switched from using a blanket to just a sheet thinking that might be part of the problem, but it hasn't helped. I'm up for hours after wards too. I haven't been having any other problems. I don't drink, I don't have coffee or anything else high in caffeine, and I don't smoke.