asking for prayers again

Suzy is still sick from this new round of diarrhea and vomiting...this is day 3 now and it's been the worst round so far. Every afternoon/evening we think she is doing better, but without fail, at 2am on the dot it starts up again and I'm changing diapers every 30 min until about noon. The doctor already ruled out parasites, allergies, etc etc so we don't know if it is a coincidence that she keeps getting different bugs, or if there is something else going on. Pray for wisdom, for healing, for rest for all of us, and that she doesn't get dehydrated or lose too much weight. Thanks.