Hey man, if it makes you feel any better, recovering addicts call them using dreams. When I got sober in 91, I woke up one morning all bummed out because I had gotten high and ruined 3 months of being straight. I thought, oh man, I've got to start over again at Day 1, my friends are going to be disappointed, what a stupid thing to do, etc.
It wasn't until I was getting out of the shower that I realized it had all been a dream. An astoundingly real dream though. Among other things, I remember tasting the dope as it hit my bloodstream. :0 The mind is incredible and frightening...
Anyway, hang tough - it gets easier with time and eventually the dreams will fade along with the cravings. Congratulations on your progress!
- Tim