Over the past several months, there have been many cases where I've gone two nights in a row with very little sleep (less than 1.5 hours). After these two consecutive nights, I would always sleep my normal 5.5 hours on the third night. People here say that because of REM rebound, I'm supposed to have extra dreams and more vivid dreams on the third night after these two consecutive sleep deprived nights. That hasn't been the case, though. I haven't remembered any dreams at all upon waking up from these third nights. Normally I have a very vague memory of one or two dreams after waking up, but that hasn't been the case on these third nights.

Even weirder is that I haven't felt the passage of time on these third nights. Normally, I'll feel the passage of time after waking up after having one night's sleep. It'll feel like 5.5 hours have gone by, even though I can barely remember anything that happened during those 5.5 hours that I was sleeping. That isn't the case with these third nights, though. When I wake up from them, I don't have that sense that 5.5 hours has passed. I haven't felt any passage of time. You know how when you've been knocked out so that you're unconscious, you have no sense that any time has passed when you wake up from your unsconsciousness? Well, that's what it feels like for me when I wake up from a third night after two consecutive nights of less than 1.5 hours sleep.

Does anyone have any ideas on what's going on here?