I'm sorry you are going through this hard time.
On that note...you might get more...more helpful responses if you post this in the caregivers support forum....this is a good place to post too, and also you might find additional support in that forum

I was a caregiveer for my mom before she died and both my grandparents need looking after, and i know the feeling of "is this ever going to end" " is everyone sick"?
and than i look at mysewlf and i too have a chronic condition..but it make me more aware of what the 'supporter' might be feeling.