I got a hamster 12 days ago and until today she was staying at a friend's house in the mountains. I just took her back home down at sea level. Ever since we got down the hill she's been acting strange. Sleeping much more than she used to. Sitting in her wheel for hours without ever moving, and before when I rattled her cage she would run out and eat or come to my hand, and she doesn't come out of her house. She hasn't had any other symptoms like sneezing or discharge or diarrhea - it's her personality that's changed. Also she's obsessed with escaping every time I take her out and she's been making strange noises and cleaning herself a TON. Is it just stress or something more serious?