The exclamation mark is read as urgency, surprise or emphasis — something demanding attention now. Dream books take it as the mind underlining a feeling that has been played down.
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.