My entire mother's side of the family has that problem. (although my mother will NEVER admit it. I have pieced it together that she knew what I was talking about as a kid by the responses she gave.) We all have different "versions" of the same dream, but there are over laps from our respective points of view. (My mother's aunt, my mothers sister, my mother's mother, my mother, me and my brother are the ones that I know have the dream.) I was up until 5 am the day we were getting ready to leave to come home from Florida with my aunt and grandmother discussing it.
It's a very scary dream and we all wake up with the cold sweats and want to cry.
As for what it means, in your case, I can't say. In our case, we think we know what it means but when we talk about it to other people, they think we are crazy.