Yeah, I get the same sometimes when I detox as well. It's almost as if I'm not really sleeping, but just resting my eyes. All the while, at the same time absolutely horrible night terrors are going on in my mind, and ones that I remember for weeks / months, whereas normally I can't remember a dream 30 mins after waking up (DMT disappears).
It's pretty normal when you detox, or so I've read. It'll pass in time.