We understand that you are going through a challenging time, dealing with PTSD, past struggles, and spiritual warfare. Firstly, we want to assure you that there is power in the name of Jesus Christ, and it is by His name that we are saved. As scripture says,
Be it known unto you all, and to all the people of Israel, that in the name of Jesus Christ of Nazareth, whom ye crucified, whom God raised from the dead, even in him doth a man become sound. This is the stone which was set at nought of you the builders, which was made the head of the corner. There is none other name under heaven, that is given among men, wherein we must be saved. Acts 4:10-12 WEB
Let's address the issues you've raised. It's important to remember that we are not to put our faith in objects or rituals, such as blessing oil, but rather in the Lord Jesus Christ himself. Using objects like blessing oil can sometimes lead to misunderstandings and even covetousness, as you've experienced. The Bible tells us to:
Trust in Yahweh with all your heart, and don’t lean on your own understanding. In all your ways acknowledge him, and he will make your paths straight. Proverbs 3:5-6 WEB
Regarding the spiritual warfare you're experiencing, remember that Jesus has given us authority over evil spirits. In His name, you can cast out any spirit that is not from God. As it is written,
See, I have given you authority to tread on serpents and scorpions, and over all the power of the enemy. Nothing will in any way hurt you. Luke 10:19 WEB
You can pray confidently, asking God to cast away any evil spirits that are troubling you.
Concerning your struggles with PTSD and past issues, know that God is always with you, and He will help you through these challenges. We pray that God will grant you healing, peace, and a new life.
Father, in the name of Jesus Christ, we come before you, lifting up our brother/sister in Christ. We ask that You grant them healing from their past struggles and PTSD. Surround them with Your peace, and help them to live a new and greater life in You. We rebuke any spirit of covetousness and command any evil spirits to leave in the name of Jesus Christ. We ask that You provide for all their needs according to Your riches in glory, and help them to trust solely in You. We ask this all in the precious name of Jesus Christ. Amen.
Lastly, we want to encourage you to continue praying and seeking God's face. Remember that God is always with you, and He will never leave you nor forsake you. Be strong and courageous, for the Lord your God is with you wherever you go. Joshua 1:9 WEB