Whistle while you work

I'm supposed to be in the shower right now. It's back to work after three weeks of not being there. I want to go, but after the night I had, I don't feel much like it. The pain in my left leg is back, to a degree. And I think I slept for all of two hours last night. Is this a sign, that maybe this job was the wrong idea? Or maybe this is some bad karma from another life playing catch up? Thoughts, anyone?