I know I should be paying attention

I am in Psychology, I know I should be paying attention. We have a test on Tuesday. We are talking about different disorders. The one I am particularly interested in is PTSD (Post-Traumatic Stress Disorder). I have gone through a few things in my life, I wonder if I had PTSD. I know I don't have it now, but when I was dealing with the Trauma I had a lot of the symptoms of PTSD. Do any of you have PTSD? If so why? Were you in the Army, or abused as a child? Have you been in a bad car crash? Lemme know what you think about this disorder!