I have days when I'm more or less fine and suddenly someone talks to me badly or I do something that is not perfect (I forget my keys/ I don't get a class assignment right) and then my whole day goes downhill. 
I have to go to bed and stay there until I switch off a bit until I can do something sooner.
I don't like this happening to me because I lose a lot of time and a lot of mental health. Does it happen to anyone else?