I don't know if this would qualify as a true ghost story, but it certainly gave me pause. I lost my daughter back in 2004. Understandably it was unexpected and put me into a state of shell shock. I took to going to the cemetery and would just sit by her gravesite, sometimes crying uncontrollably. I was so distraught that my husband on more than one occasion found me lying on top of her grave. I'm sure he thought I was losing my mind which I felt like I was.
One day I was there and as usual, was kneeling over her grave crying to the point that my body was shaking. I felt something lay a hand on my shoulder. I looked up and saw a man standing there. He was rather short and meticulously dressed. I had no idea who he was or what he was doing there. He talked to me and told me that I needed to get ahold of myself, my daughter was fine, and my family at home needed me. He said all this in a slightly disciplinary voice. I'll admit it was a bit scary the way he was talking and looking at me.
I remember that I looked straight ahead away from him for a moment before I turned back to ask him who he was. I was peeved at my perception of the way he had spoken to me. But when I turned around he had disappeared. I looked in every direction but he was nowhere to be found. There was no time for him to walk off, he simply disappeared. It scared me so bad I went to my car and left immediately, all the time checking to see if this person would show up in the cemetery or worse my car. I never saw him again.
The deal is though I was so wrapped up in my grief that I was neglecting my still-living child. I had no clue on how to honor the memory of one child without losing site of the other. How did this man know all that? Anyway it opened my eyes to how I had been treating my other daughter. It took my unknown visitor to show me what I was doing to my living child and how much I was hurting her.
Like others have said, I would think this was some sort of spirit guide.