I don't think this is an appropriate medium to ask for vet Money. But I can also understand that you are desperate to save your cat's life and health. I would like to tell you that there are many societies for protection and health of cats and are working all around the world. Since you have not mentioned which city or area you live in otherwise I would have told you the name of any such association in your vaccinity.

 How about yard work? Paper route? Dog walker?  BTW - Kudos to you for wanting to earn money on your own!!  If those ideas don't work then please don't stress about your feline friend, I'm sure you're parents will take her if she shows signs of infection.  It's very easy to tell when it's getting infected so just keep an eye on it and I'm sure everything will be fine.  Cats are very resilient creatures.  GOOD LUCK and I will keep my positive energy and thoughts going your way that your little friend will get better quickly!!