I guess I could mention it again,
Feline Rebound Liquid diet. RX from the vet.
For long term sustainance.
I pray for your strength for her, that you find the patience, now that she needs you most.
You will be able to get past this. Do what you have to do, no matter what she thinks of you, she will forgive when she feels better.
Praying for good results for the other test.