Being the middle child is read as feeling overlooked between others who claim attention. Dream books also see it as the role of mediator and the need to be noticed.
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.