I would like that information for myself...lol
I am not surprised your pdoc had nothing to offer you. I see a t that specializes in dissociation, DID, and she is always telling me how many in the field don't know much about it. I spent three years going nuts with a t who ignored my trauma and all the signs of my DID before I found her. she assures me my pdoc knows nothing about it so I don't even talk about it to her.
I am not sure there is an answer other than dealing with the trauma that is triggered so that you aren't triggered by it any more. but we have so many triggers how is that even possible? I am a professional and worry about dissociating at work all the time. just a few days ago I was teaching a class and was triggered by a bunch of bread that was stored in the room. it was the worse thing I have experienced in a long time. no idea what my problem with bread is. eat it all the time...lol...so with no way to predict a trigger, how can we possibly prepare?
so I think it is just a matter of working on our trauma as much as possible so we can be free of it. if we feel safe, we wont feel the need to dissociate. that is what it comes down to for me anyway, is safety.
take care