I've dreamt about something that was lost and that I either have it again or never lost it. Specifically, sometimes I know that it was lost and is found and other times I know it was never lost. It could be a CD, one bone out of a set (that sucked worse than losing both), money or whatever. I have and enjoy full use of it in my dream and then I wake and believe that I still have it. (I always know it had been lost at this point.) ANd then I realize that it's still lost and I experience that intial loss all over again.
worst was a dream about having tea with my mom a couple weeks after her death. I really believed that she had just been away(She worked on the road a lot). When I woke, I can't say I felt the loss all over again because I hadn't gotten over it yet, but it was fresh again.
I sometimes relive my day but with different results in a dream. Sometimes, a day that had gone well turns awry in my dream and I have the great relief of waking up to find that everything had gone the way that it had and not the way I dreamed it.

I really oughta have a run-on dream for this thread, but I've been off-line for a couple days and I'm outta practice. I'll try later if Spaw doesn't beat me to it. (He's got it in him when he puts his mind to it)

Slán,
Rich