How do you care for an elderly person who is dying?

I am looking after my father, who is 88 years old. I know him not well at all. I have been elected, since I don’t work. He is sleeping all the time. He is able to get to the bathroom with the aid of a walking frame. He has a good appetite. He says he feels terrible, ’ like a hangover 100 times over’. I have taken him to the hospital three times and they can find nothing wrong. I think he may be dying. This is a tiny, coastal community and the nearest major medical centre is two hours away. He will not go. I’m pretty worried. It’s a rural area and I am alone with him. Any ideas?