Doppelganger
To dream of your own doppelganger represents your concern about being misrepresented or replaced. Feeling that someone may takeover in your name. It may also reflect your feelings about being helped behind your back. Not liking being spoken for. Someone representing you in a dangerous manner or without your permission.
Negatively, seeing your own doppelganger may represent self-reflection over your negative actions. Shock to learn that you did something bad or unpleasant(like hearing a story about yourself drunk or snoring). Feeling framed or setup. Your feelings about a lie told about you.
Alternatively, seeing your own doppelganger may represent jealousy or feeling stupid that you didn't do something for yourself first.
Positively, seeing your own doppelganger may reflect a helpful person or resource in your life that does things in your name to help you without asking. Someone may have done something for you that you first didn't believe was possible.
People may dream of doppelgangers if they are experiencing waking life hallucinations or unconscious psychological episodes that get them put on drugs or given unpleasant treatments by their doctors. This may reflect their feelings about reporting their problems to their doctors getting them into "trouble" and requiring more drugs or observation that they don't like. Feelings about the "crazy" part of them causing problems when they don't feel crazy.