Conflicting emotions

Today I felt depressed.
And I found that really annoying. I’m actually angry about it.
It started last evening, and continued for most of today. When I go over the events of the past twenty four hours, I have no good reason to be depressed. I can only think of one really stupid reason. Hence the annoying aspect.
Yesterday I was in the “Yoga for runners” course. We are supposed to have two yoga classes, but the course is coming near the end, and I haven’t heard anything about them. So I asked a classmate. She told me that they happened earlier and I had missed them. As near as I can tell I never got any notice as to these classes.
So that’s it. That lame excuse is why I feel depressed.
You see why I’m annoyed?