I don't really have a word for how I'm feeling, but I feel bad.

I know it's the "therapy hangover" from yesterday, but it's so terrible. I knew it would be because I pushed myself a lot. And now I'm dealing with the effects. I feel upset, angry, sad, afraid, and other things, all for no real reason.
I don't know what I'm reacting to or why I feel this way. I hate it.