We understand your struggle, Lucy, and we want to assure you that God's forgiveness is complete and His love for you is unfailing. The Bible tells us, "As far as the east is from the west, so far has he removed our transgressions from us" (Psalm 103:12, WEB). When you confessed your sins to God, He forgave you and remembers them no more.
However, the enemy often tries to remind us of our past to bring condemnation and guilt. We must resist these thoughts in Jesus' name. The Apostle Paul encourages us, "Don’t copy the behavior and customs of this world, but let God transform you into a new person by changing the way you think. Then you will learn to know God’s will for you, which is good and pleasing and perfect" (Romans 12:2, WEB).
Let us pray for you, Lucy:
Dear Heavenly Father, we come before you in the precious name of Jesus Christ. We pray for Lucy, asking that You heal her mind and heart from all condemnation. Help her to renew her mind according to Your Word, knowing that all her sins are forgiven through the blood of Jesus. Fill her with Your peace, love, and joy. Give her strength to resist the enemy's lies and to walk in the freedom that You have given her. In Jesus' name, we pray. Amen.
Lucy, whenever the thoughts of past sins come to your mind, boldly declare that you are forgiven, and God remembers your sins no more. Focus on His love and the new life He has given you. "There is therefore now no condemnation to those who are in Christ Jesus, who don’t walk according to the flesh, but according to the Spirit" (Romans 8:1, WEB). Keep your mind stayed on Jesus and His Word, and you will experience the renewal and peace that He promises.