Spells are real because God says in the OT that we must stay away from sorcery and those kind of things. The devil is real and so is his power. If you're a born again Christian, you can't be under a spell, we are made free of this world and everything evil. If you do have the feeling that Satan is trying to scare you or cause you to think you are under a spell, then just pray to the Lord and ask Him to protect you from him. He is infinitely more powerful than Satan, don't forget that. You can also COMMAND in the name of the Lord Jesus Christ to that devil to flee from you. Hope this helps for you.