One thing that I feel has helped my anxiety a good deal is knowing that "It's OK to not feel OK." A large part of my anxiety is wondering about its source and if it's getting worse, etc.
Secondly, I've worked from home for 6 years now and the "turning off" thing is very important. Not only is it unrealistic to have those expectations of yourself, it's irresponsible to do so.
If you feel guilty about not working, just remember that often times the time you spend not working on a problem is just as important as the time you spend working on it. It's actually how you tend to come up with most creative solutions.
Secondly, I've worked from home for 6 years now and the "turning off" thing is very important. Not only is it unrealistic to have those expectations of yourself, it's irresponsible to do so.
If you feel guilty about not working, just remember that often times the time you spend not working on a problem is just as important as the time you spend working on it. It's actually how you tend to come up with most creative solutions.
Not only that but you deserve time off.