Congrats on your decision to leave your job! I can totally relate. I quit my job too bc I was so stressed and exhausted. It was really too bad, I LOVED my job but the management got really, really, really bad and when I saw other employees being treated as badly, I left in disgust. (And since, so have the majority of the employees that were still there when I left.)
After a couple of months I had to have something to do

so I decided to do temporary work thru a staffing firm and I found I love doing that! It's total freedom, no one can tell you when you have to work - you just let them know what days you want to work, and if you don't like what they give you to do, you just tell them that and they find something else for you. And you get to learn all sorts of new jobs and meet new people. Not to mention you basically get to "try out" a company to see if you'd actually want to work there if they are hiring.
Good luck, I know it's a tough decision to make, but I think you made the right one. Your sanity has got to come first