Hello SamDK: I see this is your first post here on PC. So... welcome to Psych Central.

I don't know as I have any answers for you with regard to your recurring dream. I enjoy learning about the findings of recent research into the working of the human brain. And one thing that has stood out for me is that a lot more of who we are, & what we do, is controlled by areas of our brains we have no conscious access to than we would typically imagine. So my lay-person's thinking with regard to your dream is that, perhaps, there is some memory buried somewhere in non-conscious areas of your brain that is causing you to keep having this dream.

What might be at the root of your dream may not even be anything that was traumatic. It could perhaps even be something as simple as something you watched on TV or in a movie at some point in your life. I know, in my own case, whenever I happen to recall a significant dream (which isn't all that often anymore), if I think about it I can often trace it back to something I perhaps saw on TV the evening before. (I like to watch the BBC murder mysteries they show on our local public TV station.)

Anyway... these are my thoughts with regard to your post. Here are links to 5 articles, from Psych Central's archives, on the subject of nightmares in particular & dreams in general:

More Than a Dream: The Science Behind Nightmares | Change Your Mind, Change Your Life

The meaning of your nightmares | Unleash Your Creativity

How to Eliminate Recurring Nightmares

9 Common Questions About Dreams Answered

How to Analyze Your Dreams (And Why It's Important)

I hope you find PC to be of benefit.