How do I help? Prayer sounds good

1st of all, 500 kids at Kidsgames, me and taryn in charge of 25 eight yr olds.
Today I get a call from Katie, telling me that we can't go to the beach with the Clifton's because of what I've been suspecting for about a month now, Cayla's anorexic. The psychiatrist "diagnosed" her today. How did this happen?
I really need to talk to God, but I just feel so far away, I almost don't want to, but I'm going to. Cayla weighs 99 lbs, she's about 5'6/5'7. (Oh Lord, help!)