When you pray for other people, it may seem that they get worse before they get better. The devil wants to discourage you from believing that God is answering your prayers. The apostle Paul said that he learned not to be discouraged even when going through terrible trials. He said to look to the things that are unseen, not to the things that are seen (See 2 Corinthians 4:18).
Keep believing, and the power of the Holy Spirit will fill you with joy and peace until you are overflowing with hope (See Romans 15:13). Always trust God to answer your prayers.