Well, I was not going to post today, but I am going to now. Why are people being so direct with the OP? Because the OP needs to hear direct. I was nice with my suggestions yesterday, today I am not feeling that nice.
I suggested yesterday that the snake needed to go to the vet. It obviously didn't because the fecal test wouldn't have come back yet. It is highly likely that the OP's snake was sick. It was not acting very much like a ball python and not gaining weight. Instead of fixing the problem the animal was pawned off on someone else. I work around 70hrs a week, I have a large family to provide for, practice a full martial arts schedule, a home to take care of, and at this time around 100 pythons to take care of. Somehow I have the time...
In my opinion the OP just wants things to be easy and neglected responsibilities for the animal she already had. To dump one and just bring another home into an environment that is very possibly infected is just irresponsible. Maybe I should take back child number three, because the dentist bills are too high. Maybe I should take back child number four because she is difficult? I'm sure this sounds ridiculous to most rational people.
The OP needs more pets like I need another hole in the head.