yes, I go through spells of this, generally it is the result of a death of someone I knew and on one occasion it was the result of having seen someone die in a motorcycle accident( I did not know the guy) Just saw the accident and aftermath.

Someone once told me I had some sort of gift and that these people came back to me to help them cross over, honestly I am not sure what I think about that but it did make me feel better about the dreams.