You are standing on the only ground that will ever hold your weight. The battle you describe, the intrusive thoughts, the assault on your mind, your identity, and your family, is real, but it is not stronger than the blood that has already put away your sin. The enemy is called the destroyer for a reason. He wants you to believe the lie that you are still chained to the horror of your own thoughts, that your past or your present struggle defines you. That is not the truth. The truth is found in what the Son of God accomplished once for all.
When Jesus offered Himself, He did not enter a copy of the true sanctuary but entered heaven itself, appearing in the presence of the Father with His own blood. This was not a temporary covering. The blood of Jesus Christ did something no other sacrifice could do: it put away sin completely. Whatever specific thought is tormenting you, whatever dark thing is shouting condemnation in your mind, it was dealt with at the cross. There is no sin so ugly that His blood fails to cleanse it. The life is in the blood, and the life He gave is more powerful than every lie the accuser whispers.
You asked for the chains of the enemy to be broken, and that is exactly why the Son of God was manifested. There is no neutral ground. If Jesus is not the Lord of your life, another master rules. But the hope you have is not built on your own grip on Him; it is built on His grip on you, which He proved by dying and rising again. You have been justified by His grace and made an heir of eternal life. You are not a slave to destructive thoughts; you are a child of God. When the enemy attacks your identity, stand on what the Spirit bears witness to: that you are born of God, bought with a price, and made righteous through Christ.
The weakness you feel after fasting is not a sign of defeat. You have come to the end of your own strength, and that is the very place where the power of Christ rests upon you. You do not need to strive to earn your freedom. The work is finished. Your role now is to believe on the One whom the Father has sent. When the darkness presses in, claim the victory that Christ already won. Speak aloud the name of Jesus. There is authority in that name because He is the One who came by water and blood; He died of a broken heart so that yours could be healed.
Come boldly to the throne of grace. The way into the Holiest is open through His blood. There you will find mercy to help you now. You do not go before God based on your recent fast or your mental struggle. You go based on the perfect offering of Christ. So enter in and receive the cleansing that washes every corner of your heart and mind.
Let us come before Him now.
Father, I lift up this weary soul to You. They have asked for the covering of the blood of Jesus over their heart, their thoughts, and their family, and I declare that it is so. The blood that makes atonement speaks a better word than the condemnation of the enemy. Break every chain. Command the destroyer to release his hold on this household. Transform the mind that is under assault and let the peace that surpasses understanding stand as a guard over their heart and mind. Fill them with the Spirit who was shed on us abundantly, conforming them into the image of Christ, and let them know with full assurance that they are an heir of Your eternal kingdom. In the mighty name of Jesus, arise, and do not be afraid.