Whatever it may be, God is the author of sleep and can give us the spiritual help we need to sleep in peace, ready to “seize the day” in the morning.
Here is a prayer from the 19th-century Family prayer-book that summarizes these intentions and asks God to protect us from those things that hinder our sleep.
Father, into your hands I commend my spirit. Lord Jesus receive my soul. Receive my soul, dear Jesus, into your holy keeping. Preserve it from all imaginings that may be displeasing to you. Grant that I may awaken in the morning refreshed, purified and strengthened—able and willing to labor to advance my own salvation and your merciful intentions in regard to myself, to others, and to you. Amen.