Contemplating several things which are annoying me, the words "sink down into humility" came to me. It wasn't a depressing "sink" at all, but more like a settling and lowering, almost comfortable. Okay, not quite comfortable.
I'm preaching in August, and this may figure into it. I have been slipping into some self pity, and so have thought Note to self: resolve to be less self-pitying, but that hasn't worked. I have been more irritable. Note to self: be less irritable, but that hasn't worked either. The "sink down" thought I immediately recognised as the real problem, even before the "into humility" part came. Arrogance has been the problem, driving the other two.
It's nice to have a diagnosis, anyway.