sick fat tail

[marylyn101]

i have a sick fat tailed gecko, it is a rescue i guess. she hasn't eaten since i got her two weeks ago. she is really sick. she has a vet apointment in a week. she has a very small tail. her tempts are 87 on the hot side. 75 on the cool side. she is on paper towel gets sprayed on the hot side twice a day and has 4 hides. one dry. one humid on each side. she lives in a 15 gllon tank.
tell me if i'm doing something wrong.