Request a day off

My mind was so exhausted... First graders, kids losing teeth, kids scraping their legs, kids scraping their faces, parents on both sides of a scuffle refusing to let it go and calling at night, kids acting like they had ADHD, and so many documents the Head Teacher needed that I had to make a list so I wouldn't miss any... I really... I honestly couldn't think of a single thing anymore. It was like there were children screaming right next to my ears... I was a little dehydrated, and I'd lost over two pounds in two days... Could I take a day off?