frustration

Just checked my work email to see if we'd had an update on the status of our principal. What I found, however, was a change to Tuesday's schedule. This arrived in my box on Saturday, after I'd had a conversation on this topic with my dean on Friday afternoon and had spent considerable time after school planning.

This may not seem like a big deal, and it's not, but it's another in a loooooong list of last minute changes that is killing me. Why do I bother planning at all?