A secret coming out is read as fear of exposure, and sometimes as relief at no longer carrying something alone. Dream books ask which of the two the dream felt like.
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.