Maltunia

I would like to refer to this as a disease (for lack of a better word).

Most everyone has had one of those days where everything that's possible to go wrong- goes wrong. If it lasts longer than a day, it isn't maltunia- either you're doing something wrong, or you just have terribl eluck.

Maltunia could also refer to a day long event where you are in a bad mood from beginning to end for no good reason. It's just one of those days.