Its very rare that i remember my dreams but at various points over the last few years i've had a few that seemed SO vivid, not nightmares but not pleasant either.

Stuff like being in a familiar house and a familar normally friendly dog turning on me, being in a plane crash and being the only survivor, being in massive car crashes and walking away etc.

Anyway, I googled them out of curiousity and interestingly the stuff I found seemed really relevant to things that were happening in my life at the time. A lot of it was to do with 'feeling like I was losing control' and I was going through some major life changes at the time.