Speaking before an audience is one of the classic anxiety dreams, read as fear of exposure or judgement. Dream books also see it as a wish to be heard and to lead.
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.