Annissa, I was going to pm you about this, but then others wouldn't benefit from what happened. One of my black cats from years ago must have had his tail run over, because when I came home from vacation it was totally dead, just hanging. Blacky looked thinner also. His tail was dead and had to be amputated.
The vet said there might be a leg problem, but there wasn't. Instead, Blacky kept gettiing impacted in the intestines. I took him to the vet several times that year. I should have kept baby sized glycerine suppositories or a fleet enema in the house, because late one night he was really straining. (The vet had me use a fleet enema the first time he got impacted. ) My sister is an R.N. and she said she would try glyerine in the morning and if that didn't work we'd take him right to the vet. Well, by morning he had died. He was very special to me. I don't want this to happen to your cat. Please ask your vet his thoughts on what I have told you.