We would not put a medical diagnosis like that on your situation. It is understandable that you carry the trauma memories of what happened within you. This can be cleared working with your channel to do trauma resolution if you desire. This is a consequence that happens when any threat is experienced in life, to have a stored trauma memory that will be referenced and stir up inner disquiet, tension, fear, anxiety, and so on, depending on the experience and the nature of its negative influence. This is a natural coping mechanism and reminds people of their inner imperative to work on their karma.
The unfortunate reality is your human culture does not bring awareness of how best to go about it. That is where your channel can be of help as he knows a process that is perfectly designed to facilitate self-healing for trauma episodes. This is what he does in conjunction with subconscious channeling as well. The consequences of witnessing the event include, in part, the triggering of many, many deep inner fears from other lifetimes witnessing catastrophes involving similar threats to survival. So this traumatization does have multiple layers but unfortunately represents a normal response to abnormal circumstances. It is all healable by doing the trauma resolution work one way or another.