Why i feel that i am dead and everything around me is not real and may be in dream or i am dead.It is really difficult for me to come back and realise.Someone has to pinch me or hit me hard or constantly talk.I get really panicked and feel i will fall down. I am afraid to take lifts alone and go to washroom or flights or trains.anywhere at night it can happen.I feel i have to come out of that place to escape else i will suffocate once happened in train which is dangerous post that i avoid. Strange thing is i cant go to washroom with lights on ,i prefer dark else it triggers. Plus i am not comfortable looking at mirror at night Morning things are normal. I am frustrated.Its almost more than 20 years i am leaving with it and it is impacting me and confidence. I am really worried Please tell me what is it.