I have heard it said, "Either you get enough rest, or your body will make you get enough rest".
Yup. That's about right. I'm on a forced few days off, and will be visiting the den-o-death tomorrow for ticker testing.
A friend asked how I'm feeling.
"I feel fine. I think high blood pressure is like driving a car, which loses its brakes, down the highway. You drive along all fat and happy, but it only ends in one of two ways. You find out when you hit the ramp at high speed, and die in a fiery wreck, or do a brake check and nurse it to a stop while praying you don't wreck. Either way the car drives fine, til it doesn't. "