So many details that can (and do) go wrong

Another horrible afternoon - the campaigns are going well, but there are so many details that can (and do) go wrong that it is very stressful. Added to this is the fact that I have to do everything myself, with no-one to help (check things, check things again, check things a third time because the artwork still hasn't been done right). One of the other marketing staff in the office (aged 28, approximately resembles X-Factor Shayne Ward, whistles and sings all day) was helpful with strategic phone numbers and suggestions but I felt so angry with the general situation that I must have seemed off-hand and rude (recently I have started to get angry when things go wrong, which is not my usual response).