Thankfully, she seems to have turned a bit of a corner last night. I didn't get a lot of sleep because she would go out and prowl around, then come back and snuggle a bit, then go back and prowl again. I'm not going to complain because I can lose a little sleep if it means she's getting better. I think she snuck out and grabbed some food when no one was looking too just like Jany said she might.
Thanks everyone!