I keep having dreams about the house i grew up in.

In the dream last night i woke up in my old bedroom and went downstairs expecting to find my mum and brother, but nobody is there. The doors are wide open, there are 2 cars in the driveway, post is sitting on the doormat, a newspaper is on the doorstep in the rain, lights and tv are on, there's food in the kitchen... It's like they've just vanished.

In other dreams i walk down the estate to the house and find the doors open etc, and nobody is home... So i take a shower and wait for them to come home. Sometimes other people turn up and chase me out of the house. Sometimes i just sit there alone, waiting....

Any ideas what this might mean?