Kitty found a home.
My sister made sure to have her vet checked before I picked her up to make sure everything was going well. I ended up picking some more food that the vet recommended, so I send that along with her. She didn't have any worms when they tested her stool, I think maybe it was because she didn't have a litter box that her tummy was bloated. As soon as I put the litter box in there she started exploring it and has been using it for the last few days.
Thank you everyone for the help.