Missing -
I'm sorry that you are feeling so low. Illness in the family can take a toll on everyone - especially the one that takes on the burden of trying to make every one feel better. Can your parents or your sisters and their families have the financial resources to pay someone to come in and do some of the caretaking or to do the driving to the doctor and the hospital? Maybe that would help take some of the stress off of you and you could just visit on a regular basis as a loving daughter who wants to visit. Try talking to your familiy about solutions instead of taking the burden upon your self. Your family needs you too.
Hugs, Jo