honestly, you do it one day at a time! You try not to worry about tomorrow until tomorrow and you learn to love and appreciate every single day and realize that nobody has any guarentee in life.
You do what you can, fix what you can, and not worry about what you can't.
It sounds like your daughter needs some enzymes and I would call the doc, tell him what you told us about what her poop looked like and ask if you could try some enzymes for her to see if it helps or not while you are waiting for the test to come back. Enzymes won't hurt her at all so trying them might 1. do the trick and 2. make her feel better.
The best thing you can do to help you through all this is to make sure each is getting the very best medical care possible, is taking the appriopriate meds, and doing the treatments.
You can do this! There are several of us here and willing to give you the support you need to get through all of this.
Keep us posted and certainly let us know if there is anything I can do for you,
Patty