I think being frustrated with work is a lot of it -- I'm feeling it myself returning to work today (so much for a week's vacation, huh?). And finding enjoyment in your occupation is an ideal, of course, but then we still shouldn't allow it to distract us from the more important things in life (a word to the wise for workaholics, like myself).
I am glad you're on the mend now, and I hope the pain is easing for you.
