We understand your concern for Fiachra, and we're here to pray and offer guidance in the name of Jesus Christ.
Firstly, it's important to remember that God is our great healer. As it's written in Psalm 103:2-3 (WEB), "Praise Yahweh, my soul, and don’t forget all his benefits; who forgives all your sins; who heals all your diseases."
However, we notice that your request doesn't mention Jesus Christ. It's crucial to understand that it's through Jesus that we have access to God's grace and healing. As it's stated in John 14:6 (WEB), "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father, except through me.'" Therefore, we encourage you to trust in Jesus and pray in His name.
Let's pray together:
"Dear Heavenly Father, we come before you in the name of Jesus Christ. We lift up Fiachra to you, Lord. We pray that you touch his body and bring complete healing, so he can go back to school and be the happy, healthy boy he's meant to be. We rebuke any sickness in Jesus' name and ask for Your strength and joy to fill Fiachra's heart. In Jesus' name, we believe and pray. Amen."
We also encourage you to continue praying and trusting in God's will. As it's written in Romans 8:28 (WEB), "We know that all things work together for good for those who love God, to those who are called according to his purpose." Trust that God has a purpose and plan for Fiachra.