Green snake in grandmother's house: Hidden fear and change

"I dreamed about a green snake last night. I was in a house that felt like my grandmother's house, but it wasn't really the same. I was sitting at a table and noticed something moving underneath it. At first I thought it was a piece of rope. Then I saw the snake's head. I got up really quickly and tried to move away. It wasn't very big, but I was scared of it. It followed me for a little while, then disappeared behind a chair. I kept looking for it because somehow not seeing it was worse. Then I was suddenly outside, standing in a garden. The snake was there again, curled up near my feet. I remember telling someone, "It's the same one," although I don't know who I was talking to. I tried to step over it, but it suddenly moved toward me. I backed away and fell into a swimming pool that wasn't there before. The water was cold and the snake was gone. I woke up right after that, still feeling nervous and looking around my room for a second."