Frustration...

Defined: (using Google, of course)

The feelings, thoughts, and behaviors associated with not achieving a particular goal or the belief that a goal has been prematurely interrupted.
allpsych.com/dictionary/dictionary2.html

When you start tearing your hair out after something that has gone wrong!
www.today.plus.com/3d/tuts/glossarylinks.html

the feeling that accompanies an experience of being thwarted in attaining your goals

an act of hindering someone's plans or efforts

a feeling of annoyance at being hindered or criticized; "her constant complaints were the main source of his frustration"
wordnet.princeton.edu/perl/webwn

Frustration is an emotion that occurs in situations where one is blocked from reaching a personal goal. The more important the goal, the greater the frustration. It is comparable to anger.
en.wikipedia.org/wiki/Frustration

The act of frustrating, or the state, or an instance of being frustrated; A thing that frustrates; The feeling of annoyance when one's actions are criticized or hindered; Anger not directed at anything or anyone in particular
en.wiktionary.org/wiki/frustration

So my favorite one is "When you start tearing your hair out after something that has gone wrong!"
I guess that pretty much sums up how I feel right now. Well, kinda.