When I first stopped using, I had them pretty often, and very vividly. My DOC was weed. When I first quit, I hadn't dreamed in years. Though this is a bit "sick", at first I actually enjoyed them. Kinda a free buzz.
I still have them occasionally now (clean about 8 months) but now they freak me out. I've woken out of a solid sleep thinking that I just pissed away the last 8 months. I know that, for me at least, once I take that first hit, I'm done, once again. Been down that road too many times, not going down it again!!
I wouldn't stress about them too much, just about everyone has them. Just don't let them be a reason to think you might be able to use again. On that note...time for bed!! Take care.