Have faith in the Lord to keep you safe! You can rest in Him knowing that He will let you know when it's time to wake up. He will not let your enemy run you over.
To help build your faith check out these short bible verses.
So faith comes from hearing, that is, hearing the Good News about Christ.
And it is impossible to please God without faith. Anyone who wants to come to him must believe that God exists and that he rewards those who sincerely seek him.
Therefore, since we have been made right in God's sight by faith, we have peace with God because of what Jesus Christ has done for us.
Every child of God can defeat the world, and our faith is what gives us this victory.
1 John 5:4
But to all who believed him and accepted him, he gave the right to become children of God.