Trauma is generally defined as a deeply distressing or disturbing experience. Something terrible happens and the person involved has a strong reaction to it, likely centered around being anxious and protecting oneself. While uncomfortable, this is the body doing what it normally does to protect itself.
Take a moment and hold your breath. Keep holding it. Soon your heart is hammering in your chest and your struggling to breathe. Your face is beet red and you feel as if you are losing control and you are going to die. Then you have an idea of what a panic attack feels like. This could help you identify a panic attack.