Sending an SOS is read as an urgent need for help or rescue in some part of life. Tradition treats it as stress asking for attention and support.
Has this come up in your dreams before? What was going on in your life then?
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.