Being a caregiver...

So I’m currently a caregiver for an older lady with stage 3 brain cancer. I’ve been here for almost a year and the job has its perks but I’m being paid nothing. I only make 9.25, and that’s with a raise. I only bring in about $800-$1000 a month, depending on my hours. I also just got a new car and have a $200 car payment so it’s been really hard to pay all my bills. I’ve been considering getting a different job but I would feel so so so terrible for leaving her in her time of need. I’ve been battling with myself for a while, and I’ve been telling myself I need to support myself first but it’s so hard. I guess I just need a push in the right direction. I also am dreading the talk I’ll have to have with her and her family, about me leaving. How should I say it and what should I say?