You've been going full steam ahead for a long time. Have you forgotten how to completely relax? To your credit, you've been trying to mellow out, but your efforts so far aren't giving you the full rest you desperately need. You're going to have to work harder to stop working! Turn off the phone, cancel a meeting, and schedule some quiet time. If possible, an entire day needs to be set aside for your personal relaxation. Just coast for a while.