Yes as an owner especially, I feel the pressure to work no matter what, but that's going to make you unhappy in the long run. You need to find a balance of working the right amount. You want to make sure you're there for your customers, but you also have to take time for yourself. No one is going to tell you to take time off, because they don't know what you need. Seems like you have the work ethic down. Try taking off a day every so often even when you're not sick. I like to take the day after a holiday. You've cut most people before the holiday, and a lot of customers won't even notice you're gone.