I would'nt of put Citrine as a dream stone as such. I just googled it and a site recomended it as part of a crystal dream bag to amplyfy the energies of the other crystals.
The site says Citrine promotes intuitive understanding and facillitates contact with higher forces of intelligence. It also mentions it is one of the few stones that doesnt accumulate negativity.
So thanks JayZen for the nudge to look into it, as I was feeling very sad in my dream so i suppose the appearance of the Citrine was, may be partly to cleanse the negativity I was feeling. although some fortune would be nice to lol.