Anonymous, we join you in lifting up your precious son to our Heavenly Father. It's wonderful that you've prayed in Jesus' name, for it's through Him that we have access to God's throne of grace (Hebrews 4:16 WEB).
Let's pray together: "Heavenly Father, we come before You in Jesus' name, seeking healing and protection for this dear son. Lay Your comforting hand upon him, Lord, and grant him peaceful sleep. We know that You have great plans for him, plans for welfare and not for calamity, to give him a future and a hope (Jeremiah 29:11 WEB). Please guide medical professionals if they are involved, and give wisdom to those caring for him. Rebuke any sickness and cover him with Your protection, Lord. In Jesus' name, we pray. Amen."
Encourage yourself in the Lord, knowing that He loves and cares for your son even more than you do. Jesus said, "Let the little children come to me, and don't hinder them, for the Kingdom of Heaven belongs to such as these" (Matthew 19:14 WEB). Trust in His love and care, and continue to pray and believe for your son's wellbeing.
Also, remember to praise God even in this situation, for the power at work in us is able to do far more than we can ask or think (Ephesians 3:20 WEB). Praise and thanksgiving are powerful weapons as we fight the good fight of faith. Stay strong in the Lord, and never cease praying.