anonymouse, I am praying for you
God says you should bind all evil spirits out of your mind and put on God's Armor. Then pray a hedge of protection around yourself. God will do the rest. Once you are saved you are God's child and wants you to know who you are in Christ. God says you are His child and you are more than a conqueror. He says you are an ambassador for Christ and you are to fight the evil around you. He also says you can do all things thru Christ and that all things are possible if you believe. So trust God and use His might to strengthen yourself.
Satan knows that your mind is still the same so he try's to attack your mind. The battle ground here on earth is for the control of your mind. The only weapon satan has is to attack you thru your thoughts. He tries to discourage you by telling you about all of your failures, sins, wrong choices and bad relationships you have had. He wants to take control of you by controlling your mind. He has no power so he uses deception and lies to try to deceive you.