Starting a company is brave and takes a lot of work. You've done something amazing.
But you're a finite resource. You can't make your company succeed if you yourself start to fall apart. Part of keeping your company going is keeping YOU going. Make time for your family away from the work. Make time for your mental health. Take time to relax. These are tasks that are necessary to keep your company afloat.
The work will be there when you return, and you'll be better and faster at it if you're rested.
Good luck!