My symptoms usually start as the physical and then I realize that I am suffering mentally also. I believe that it is a combination of both in order to suffer from PTSD. I was surprised to find out that it is a mental disorder when most of my symptoms are physical. For example, the heart pounding, asthma attack feeling during panic attacks, the anemic-like fatigue, and the flu like symptoms like nausea, vomiting, irritable bowel, and headaches. I believe there are studies now being done about nervous system pathways. When a person goes through traumatic events, certain pathways are opened for survival. Unfortunetly, among us, those pathways do not close after the traumatic event passes and our nervous system travels those pathways during normal stress, hence our reaction to normal stress is the same as the reaction to the trauma itself. It really sucks, and it feels like you are not in control of your body or your mind.