Could my 3mth. old cats jaw be dislocated or broke?

My cat got in between the dog and her food! My dog went nuts and started to attack my 3mth old cat. I tried to break it up but it was to late, the damage was done. My cat was freaking out making loud screams and running. I caught her and she had lots of blood coming out of her mouth. I got the bleeding to stop and a few hrs. later she started to have a infection somewhere internal on the right side of her mouth. The next day she seemed to be doing a little better so I thought she was ok, I thought maybe the dog had just bit her pretty good inside her gum or something of that nature. Well, as I looked at her later I noticed she had her mouth open and she was not able to close it at all. She is not able to eat anything nor drink water or milk. I took a syringe and started giving her liquids, which is not easy to do. I took her down to our local vet which wants $275.00 for an x-ray before she will even look at her. I asked for some type of payment plan and they said "No" I don't have that kind of money! I took my cat out of that vet and brought her to another one in a different town where the vet will be gone for a day or two! I don't know what to do? I have nobody to get the money from and we don't have any place around here that will help with the vet bill! I don't know if this cat had a dislocated jaw, a broken jaw, or what? The cat don't seem to be in pain now, but still can't close her mouth or eat or drink. She also keeps hiding in small areas in the house but sometimes she is running around like she use to. I don't want to sit here and watch our cat die or die of starvation. What do you think could be wrong with her and what if anything can I do to help her? Thanks.