In many ways God gave that child or sister or husband or parent we are so worried about to us in the first place. What if we did this with the expectation that the Lord could and would do things we can not - and have an open mind to new possibilities. We often box ourselves in by naming everything that can go wrong and by not exercising the faith God says he has given us. We may be standing in the way and not letting God work. Faith sees possibilities.
Faith believes there is an answer.
Faith does not give up. Faith in the Lord goes beyond human confidence. Give your worry to God over a loved one. Pray, believe, trust, and do not keep this concern all to yourself.