Have there been any human cases of death by sleep deprivation? A lot of lower mammals straight up die if they're deprived, but while humans suffer pretty extreme cognitive and physical decline, I don't think they physically die from sleep deprivation. The world record stands at 11 days.
Did you get any of the hallucinations that supposedly accompany sleep deprivation? After just 44 hours, lights were very strange and I had trouble seeing detail in things, or focussing. Not a hallucination though, probably just the accomodation muscles in my eyes being absolutely exhausted. It was like I was permanently spaced out. I could see things best if they were like 2 metres away from me.
I haven't really read too much on lucid dreaming because I've never had to train to do it, but why is dream recall important? As far as I know, it's simply the realization that something happened that could only happen in a dream, and therefore you're in a dream that you can control. Is that what you mean by you've been reality checking yourself? That seems like it would work if you built up a habit of checking whether or not you were dreaming.
I recommend the following movie, which I think is pretty relevant to our discussion, and is an excellent film in its own right. Abre Los Ojos (Open Your Eyes)
http://en.wikipedia.org/wiki/Abre_los_ojos
It was later remade into Vanilla Sky, starring Tom Cruise, for English audiences, but the original film with English subtitles is superior. It's one of the few films that might defy any consistent genre classifications as it's constantly changing. It starts off as a lighthearted romantic movie but soon after devolves, until by the end of the movie, you're wondering how it got into sci-fi! Don't read any spoilers! I'm sorry if you've already seen Vanilla Sky.