It sounds like it would be scary, especially since it is related to your trauma somehow. I'm guessing your body is trying to escape the triggering situation, so you go there involuntary because it was the only thing you could control in the moment.

My $0.02 is that you can either pass the time or control it.

Passing the time is consuming media, playing games, whatever you need to do until enough time passes and you return to yourself. It's probably not healthy because your body has already 'let go' of reality, so I can't seeing that anchor you. If you just need medicine to start working and you have a safe movie or show, whatever, then I can't blame you.

Controlling time is maybe an exaggeration, but actively making and things that are persistent might help anchor you. Writing, drawing, painting, any other analog prices where you contribute to the space around you.

The deal is that you must save something from the last time you were not properly connected, and everything else you create needs to go somewhere. If you are writing, drawing, whatever, you can probably collect a lot before you really have to get rid of things. If you are painting and can't get rid of the canvases, you can always paint over them. Something like pottery might be a little more difficult, but that's all up to you.