I'll try it in English because I will lose my French.
The current DSM-IV definition of post-traumatic stress disorder requires a stressor that was so important, that made such an impression on you, that you thought your life was in danger. You were convinced you were going to die or that somebody next to you felt peril for you, somebody very close to you, and you had a reaction to it. Most people would have racing heart, trembling, you might have vomited, you might have messed your drawers—a very, very intense reaction, a flooding of stress hormones at the time. If that didn't happen, it's not impossible, but most psychiatrists would say you may have an operational stress injury; you may have persistent psychological problems linked to stress, but it's not PTSD, it's something else. It could be a simple anxiety disorder. It could be you've triggered a depression that is not PTSD. It's important because the treatments are different.