I dreamt that In my snakes tank, there was a second snake, and no one knows where it came from. The new one was smaller that the real one though. My mom (in the dream) told me that the second snake burrowed through a hole into the tank. In the dream, I was scared that my snake was going to kill the new snake, and the new snake was scared of it too.
I really don't know and i'm no expert but by any chance has there recently been any additions(possibly a new baby) to your family or significant change that may have made you feel slightly put out? i'm just guessing but it sounds like fear of change. hope this helps but im probably really far off x