Without Insurance

Hello, my girlfriend was diagnosed with Non-Hodgkins Lymphoma almost a year ago and has not received any treatments because she doesn't have health insurance. Doctors want $1500 upfront and then $89 a week after that. Can someone please tell me what we can do to get her these treatments without having to give that much money out of our pockets? We are getting very desperate, because we know that she needs to get help immediately, but financially we can't do it. I would appreciate any information please.