Jamais vu, when the familiar suddenly looks strange, is read as distance from your own everyday life. Dream books link it to alienation and to seeing an old situation with entirely new eyes.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.