I have only had two dreams that I felt compelled to share to other Christians.
When I first became a Christian there was a lady at the church I was attending that I really liked. She was gone for a while and during that time I had a dream about her. She was in a room with others and they were "attending" to something. The one thing that struck me is that she was the only one in color that is how I attributed the dream to her. When I woke I was thinking about the dream and I was given the message that "the Holy Spirit was there". That is all I really was made aware of. It took a while before I saw the lady again and when I saw her at church she told of how she was at the bedside of a JW. Turns out she and a few others from this church were involved with praying for and helping JW to come out from that cult. I didn't know quite what to make of the whole thing but I was compelled to tell her about the dream. The only thing I told her was "that the Holy Spirit was there". She tried to press me for more details and so did the daughter of the JW woman who had also been praying at the bedside of the JW who was her mother but I told them that the only thing I was supposed to tell them was that "the Holy Spirit was there".
Another dream I had was about a woman that was very dear to me and I couldn't make it to her funeral. I had a very vivid dream about her and that she was in a wheel chair The wheel chair had been painted white and wheeled into a room that had a very large window overlooking what seemed to he the whole world. She was wheeled up to the window but she couldn't see out from her wheelchair so she stood up. I shared that dream with her family and they seemed to be encouraged by it.
Thanks for sharing these dreams. They fit the bill of being short, to the point, and unforgettable... so I would be like you and wonder about their origin. I had a dream about my sister when she died. I saw her wheeled toward a waiting group of people. When she got to them she stood up and there was a lot of hugging. I thank God for this dream of seeing my sister greeted by loved ones in heaven.