The Devil is in charge of death, but Jesus came and died so He could,"destroy him that had the power of death, that is the Devil"(Heb2:14). So, you must rebuke that kind of fear just as Jesus did ! We're not to fear Satan, who only has the power of death over the body , but we are to fear God, Who has the power of death over the soul .
Fear is the exact opposite of faith ! Fear of the Devil, fear of death,...this is opposite of faith. That's the kind of fear that will destroy you, and could even kill you, if you continually let it torment you. And that kind of spiritual fear is contagious, just like a disease!
The only cure is to call on Jesus ! Call on the Lord and ask Him to deliver you. The Bible says," Resist the Devil and he will flee from you."(James4:7) You have power over the Devil through the Word of God!
If you know that you love God and that He loves you, you know that He is going to take care of you, so why should you be afraid? There's no reason to fear !