Stress and Aural Skills

Today in Aural Skills (ear training for musicians), we were trying to go through a few examples and while the example was playing I got really distracted, and frustrated that I was not able to do write down what I was hearing. It was in my head, but I kept hearing the wrong notes. This feeling of frustration does not help when I need to study, it's just the opposite... it makes me want to just do something that I am good at instead of trying to figure out the right notes. Out of the three examples only two of them came together by the end of class.