Everyone dreams, and most people remember their dreams at least occasionally. People who have had NDEs say their NDEs were totally different than their dreams. For example, upon awakening, a dreamer usually knows the dream was not "real," whereas upon returning to normal consciousness, NDErs usually say the NDE was more real than normal reality. Similarly, people who have experienced both an NDE and hallucination say the two experiences are quite different. Again, in retrospect, a hallucination is known to have been "unreal" whereas an NDE usually is perceived to have been "hyperreal." Your doctor may understand dreams and hallucinations more than (s)he does NDEs. In particular, extensive research has shown that NDEs are not an indication of mental disorder.