I remember dreams like that, I honestly admit, it really scared me, but God calms me down and makes me feel safe, How beautiful and merciful is He!

Have you been going to church lately? Have you been receiving the Holy Communion?
John 6:56
"Whoever eats my flesh and drinks my blood remains in me, and I in him."

John 6:53
"Jesus said to them, "I tell you the truth, unless you eat the flesh of the Son of Man and drink his blood, you have no life in you."

Pray, Read the Bible, Attend church and receive His blood and His body, and you'll probably stop having this demonic attacks, just ask Him to help you, just ask with faith.

Demons fool us because we have no experince enough to fight them, or understand their ways, they can even take the form of angels, my guess is that you are a good fighter, that's why they think your dreams are their last resort, prove them they have no resort at all, Jesus is inside you, He's all around you, He's everywhere.