I'm so, so sorry to hear of your very great loss, on top of everything else you have to deal with. It really does suck to have a list

and the loss of your mom, after losing your dad a few years ago - I can't even imagine that type of pain. I'm so, so sorry to hear that. Just try to take it moment by moment and get as much help as you can, like just use those wheelchairs that the airlines provide!
I add my gentle iHugs and prayers