My thoughts, consider purchasing a lot more pull-ups for round the clock use and consult with a doctor on how to proceed. I'd also try and find a way to incorporate her routine into the training, like placing a garbage bag or container under her bed. If you don't have baby-wipes on hand, get them and explain how to use them. Do you have a bathroom (with a good lock) that she could call her own until this behind her? She might feel safer that way.
:grouphug: I'll be praying for the two of your family.
And I would go out of my way to ensure she doesn't feel punished.