I don't know if I'm a 'believer' or not, but reading stories like these is comforting.
I've had two odd dreams like this.
One, the night that my great grandmother died, when I was 19, I didn't know she was in hospital, she was in her nineties. I had a dream about me, my gran and great aunt having to go to the hospital to see her, she wanted to see us before she went. I can't remember the details now, but I remember it being very vivid and real, and waking up thinking it was a bit too real. I found out the next evening that she had died that night.
The other was a bit less spooky and more comforting. My grandad died when I was about 12. The night before I graduated, about 12/13 years later, I had a very very vivid dream that my whole extended family were standing in a room, all facing one way watching something, and I noticed that grandad was stood behind us, noone could see him apart from me. I asked him why he was there, and he said that he was always there, still with us, and he wanted to come to tell me tonight that he was so proud of who I'd grown up to be. I'm actually in tears typing this now - There's nothing like your family telling you they're proud is there - it was just so real, I know it was him. I told gran (his wife) and she wasn't sceptical at all, she said she was pleased he'd come to see me. I was only 12 when he died, so never got to know him as an adult like I have my gran, who I consider my friend as well as my gran, we'll go for lunch and shopping together, she's a pretty cool 79 year old! I feel so sad I didn't get to know my grandad the same way. But so happy that I have made him proud.