I feel for you Lloyd. My mother died of lung cancer over 2 years ago. She didn't quite make it to her 67th birthday. Fortunately she had a faithful husband by her side to help care for her during her 2 year ordeal.
I think that Hospice is a good place to start. Friends and family can help out as well, both yours and your mother's. Granted, her friends are likely to be elderly, but if they are able to visit her, just being there may help pick up your mother's spirits and help get her mind off of her condition, if that's possible. While they are visiting you may be able to get some needed rest or take care of some personal needs. When Hospice visits, you will also have time to rest and take care of other business.
Also, if you haven't done so already and Hospice does not provide advice regarding your mother's legal matters; will, assets, life sustaining efforts, and so forth, I suggest you see an estate lawyer to discuss the preparations and decisions that you and your mother might want to make now so that you do not regret not making then later.
I hope this advice is helpful. One other think I would suggest, if you have a copy of the Bible, take some time out to read it. Draw comfort and strength from God. It may seem that you are alone, but that is not really the case. I thought about you today when I read your message and God is always there.
Take care Lloyd
Mike P.