Answer:
an acute stress disorder.
Explanation:
In abnormal psychology, an acute stress disorder is distinguished as a condition in which a person develops dissociation, severe anxiety, and a few other symptoms that tend to occur within a single month after he or she is being exposed to an extreme "traumatic stressor", for example, serious accident, witnessing the death of loved one, divorce, etc.
As per the question, Paul would most likely be diagnosed with an acute stress disorder.