please take your cat to the vet, and please come back and explain what you meant by "leaving her". If you cannot afford a pet, you should not have one. A lot of vets offer Care Credit, which is a low interest payment plan for vet visits. Or get a low interest credit card to keep for emergencies only. Or, like I do, have a special savings account just for your animals. I have 3 dogs and 6 cats, so I cannot afford to not have money to get them treated, because with that many, something is always bound to pop up. If you cannot do this, please find a rescue willing to take her, because it is very selfish to not take her to the vet. She relies on you and you are letting her down.