I Want To Know Why I Get So Hot When

I want to know why i get so hot when i lie down to sleep day or night my whole body , some time i sweat but it always jolt me awake as soon as I'm about to fall asleep. It's been going on a while no. I'm meopasul i completed it eight yrs ago but it didn't effect me like this . Its like i never get any sleep day or night thirty min here ten minutes there and I'm so tired.