Take Katniss to the vet

This is Katniss. She's three months old, and she used to live on the street with her mommy and her brothers.

I fell in love with her as soon as I saw her and decided to adopt her. It was really hard convincing my parents to let me keep her. They never wanted any pets. But they eventually said yes and agreed to pay for the litter and food. 

She's been with me for nearly a week now and I can't imagine my life without her anymore. Thing is, now she needs to go to the vet to get her first vaccines and to make sure everything is okay. She keeps sneezing and I'm afraid she might have a respiratory infection. But my parents are refusing to pay for the vet. 
 
I'm still underage, so I don't have a job yet (it's pretty much impossible to get a job before 18 around here) and can't afford to take her at the moment. :(

I'd really, really appreciate it if you could help me. 

Thank you!