Veiled, what your talking about is exactly what causes PTSD in the first place, continuous traumatic thoughts, panic, living a life in hidden panic basically. This is how we get PTSD to begin with, because what starts out as a traumatic event, begins to build inside us, we manifest that one traumatic event into all the "what ifs" and then panic over those thoughts, and the list goes on.

What your describing is not new, it is what factually happens to cause PTSD the majority of the time.