Here's one to add to the Ab-music dubious mental heath confessions. I have experienced quite a few episodes of deja vu, as you do. Mine have gotten more and more vivid to the extent that I would know that I am in a dream that would later actually occur while I'm still having the dream. The situations were usually just a small chain of events, like a certain group of people turning up while some other task was going on, but I'd be able to recall the flow of the conversation (but not the full content). All very "oooh freaky" but not really anything to worry about you'd think.
The "ah shite" part comes after I now think I've seen my own death. I was in fairly plausible dream as a passenger in a car very similar to one I am planning to rebuild one day, I was driving off road with someone else who I didn't recognise when suddenly i think I fell out the vehicle (not quite sure what happened as it was split second thing) and my head was crushed under something or the vehicle rolled on top of me (again not sure, think it was a black piece of metal on my face but then the dream just stopped).
Kinda not sure where to go with this one, other than trying to never get into the situation where it occurred! ....but then did I die after freaking out that I was in a situation where I thought I was going to die so jumped out of a moving vehicle only to be run over by it?