i let my cat out for about 5 minutes this afternoon, and she went out like she usually does beneath the cedar trees. i let her in, and i didn't see her for about an hour. i went into my bedroom where she usually sleeps. when i tried to pet her, she sort of lunged at me and didn't let me touch her( like when she smells another cat on me-but i haven't touched another cat today). i thought maybe she was just being stubborn, but she wont move at all, she's just laying there, and she won't let me come near her. If she moves at all, she just curls back up into a ball. She's never done this before. Is there something wrong with her?