My python not eating and getting skinny

So I not long adopted my ball python and she was a normal size and I think she was around 4ft (I’m sorry I don’t know metric units) and she was a decent size and weight, then the last couple of weeks I haven’t seen her eat a meal and I’m worried because I have checked if she was stressed and her tank is perfect and all of the other snakes in the room are eating, and she was 89 grams and she’s now 77 grams, and I am worried that she will die, what should I do to help her eat and regain her weight, thank you<br><br>My ball python is in a 3ft tank with some branches for her to climb on, she has some hides and a water bowl and her tank is perfect temperature (hot side 26-28 degrees and the cold side 22-24 degrees) and the humidity us around 60-70% every day, I have tried a few ways to get her to eat like getting her food of a different colour but she still didn’t eat, I even tried getting her food that tastes like chicken but she still didn’t eat, I have tried putting her in a separate room to eat but that didn’t work, and I don’t want my snake to die, please help<br><br>Edit: I am getting her to the vets in a couple of days but I was asking if there is anything I am able to do before I take her to the vets, and the room is around 20-22 degrees and humidity is around 40-50%, I don’t know much about snakes I am just asking for help, I don’t want to go on r/snakescare, I trust a breeding page more than that page