Counting more fingers than you should have is read as something being off in a familiar picture. Dream tradition also sees it as an unusual ability, or as the mind noticing that it is dreaming.
Does the traditional reading fit your dream, or did it mean something else to you?
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.