I think it's the hypnopompic state. It's a state of consciousness after you wake but still have lingering REM-like brain activity. It happens to me all the time. I'm not sure if I'm thinking, daydreaming, falling back to sleep and dreaming, or maybe it's all a false awakening. It might be different each time or some gray area in between. I find that if I recognize I might be dreaming and just be patient, I can sometimes will myself into a deeper dream state that becomes more stable like a full on WILD.