Novice question

Is it possible that I have LD but doesn't remember it, like much other dreams? When I fall asleep I sometimes feel that my consciousness changes, that body prepares to sleep and this is some kind different than usual fall asleep process (haven't that feel before start learning LD) . But in the morning when I woke up, I don't remember anything past that.

Or it's guaranteed to remember if I was LDing and I just imagine things?