Should I just quit my job because it is making me extremely unhappy?

I don’t need the money very desperately. I have another way I can support myself but it won’t be the same kind of lifestyle of course and I’d have to limit myself.
But my job is making me very unhappy. I mean, I actually stay awake at nights just thinking about how miserable I will be tomorrow at work. I’ve tried all sorts of approaches to try and enjoy my work place but I feel like I’m dying.
Should I quit? Or am I as unhappy as any other person with their job?