Lost it at the photocopier

Well, my plan to make life better at work, obviously hasn't worked! Today, I lost it at the photocopier in the main staff room and began to cry inconsolably. When I look back on it, I have snap shots in my mind of a lot a very shocked people. I can laugh about it now but at the time I couldn't stop crying and I didn't care where I was. I have no idea where it all came from. Oh yes you do, I hear someone say! And you are right! But I just want it all to go away. I hate confrontation and I know that that is where this is all leading. I will have to confront my line manager, the head of school and human resources about their treatment of me and I can't face going through it all!