Hello, I have a few questions for you so that I may better assit you. If you would be so kind to try and fill me in on a little of her history that would be great.
Does she drink a lot of water?
Does she sound congested or short of breath or is it just a panting kind of thing?
Does she drool a lot?
Is her abdomen distended at all?
Does she have any swelling in her limbs?
I am sorry but there is no medication that I know of that can be purchased on line for her POssible condition. Not to mention I have no idea for sure what is going on with your baby since I have not been able to see her in person or lay hands on her to examine her. I could not in good faith tell you a drug even if there was one out there that could help your baby. I understand finances right now and I would try and call your vet and see if they can work out a payment plan with you so that you can get her seen and properly diagnosed. If that is not possible there is a company called Care Credit that can help finance the bill and you would just have to pay it back like a credit card. Here is a link to their site.
I would try to talk to your vet or call care credit and see if they will be able to help. Please let me know if I can do anything else for you.