I have a history with the demonic and activity/experiences related. In order to walk in victory and peace over this struggle in your life, you'll need to ask God to show you who you are in Christ, which is everything you've become through being born again. In truth, you are God's dearly loved (beloved) child. Perfect love casts out all fear (see 1 John 4). God has made you righteous by faith. You become the righteousness of God when you changed your mind concerning sin and believed that Jesus died for your sins, was buried, three days was resurrected, and ascended into heaven and made to sit at the right hand of the throne of God where he now sits as Lord and King. This righteousness is a gift to all who believe, and is something you'll need to recieve in your understanding, experience, and personal walk with the Father in order to "reign" over this that is troubling you. (see Rom. 5:17). In truth, when Jesus died, he defeated satan and every demon. As a child of God, there is not anything in all creation can separate you from His love, because he has transferred you into the Kingdom of His Son, Christ the Lord, and brought you out of the kingdom of satan and darkness. (see Rom. 8:39 Col. 1:13)