My subconscious is confused.

I keep having variations of the same dream. I'm hanging out with Mom at her house, and then suddenly I remember that she died and somebody else owns the house. So now I'm scared that we'll be caught inside the house by the new owner and I'm worried about where Mom will live now. She can stay with me, no problem, but  I don't have all of her stuff, and is she going to get mad at me for what I didn't keep? But most urgently we have to get out of this stranger's house before they come home and catch us inside! We have the lights on and everything, we'll be seen from the outside! Did we move anything? Is my van out in the driveway advertising our presence? How did we even get inside here, anyway? And then I wake up in a panic before I realize that it was just a dream, Mom's still dead, and I don't know whether to feel relieved or sad.