I've been the primary caregiver for my terminally ill Father for 3 years now. I need help and have nowhere to turn. Any advice?

I am 23 years old now. My father has Stage IV Lung Cancer inoperable, severe rheumatoid & osteoarthritis, which leads to severe mobility problems, severe sleep apnea, major depression, severe generalized anxiety, panic disorder, OCD, atrial difibrillabriation, high blood pressure, high cholesterol, glaucoma, macular degeneration, hearing loss, and more. I am the only Caregiver, with no family willing to help. My mother died from breast cancer when I was one. I have been Caregiving for my father since I was 17 years old. As I approach 24 years old, & my father continues to beat the odds, I am both happy and sad about this. I want to know if there are any options out there for me, that would allow me peace of mind and my father to receive appropriate care. We have limited funds, however, we are not completely without means. Any advice or support would be greatly appreciated. I am in this alone, most days. Thank you.