A Child Will Lead Them

My son isn't a child anymore, but I want to follow his faith example. He and his wife are really struggling financially. He was the day caregiver at home since he could work from there while she went out to her job. He has recently had open heart surgery (at age 30) and cannot hold the baby for several more weeks. Friends have graciously helped with child care. They couldn't find anyone for today or tomorrow so I was taking today and she'll just take off tomorrow as her day off. Right after we set that up, I re-injured my shoulder and can't lift anything! I'm miserable for letting them down. My daughter-in-law has to take today and tomorrow off. Now they're losing an extra day of work because of me! My son's attitude? God has a reason. It's ok because they did all they could and this is what God has chosen. He'll take care of it.
I want faith like my son's!