Felling dizzy and sweating ?

I was getting out of bed one afternoon, i work the graveyard shift, to use the bathroom and i got really dizzy. I had to lean aganst the wall to steady myself. Once i got back in bed i started to sweat really bad. THE bedding was soaking wet. this lasted for about 15 minutes and then i feld better but not great. I got really scared came close to telling my son to call 911. Does anyone know why and what it might have been. IT has since only not as bad.