I had a dream i accepted the devil

I'm not religious in any way but found myself with a strange dream the other night, in my dream just as I went to sleep I said "I accept Satan into my body" (I said that in the dream) and as I did a sort of black serpent made from some sort of smoke attacked me in my room along with another figure, I remember being hurt and frightened in my dream and wanting to wake up, what does a dream like that mean?