A form that keeps changing is read as a situation or person you cannot pin down. Tradition also sees in it identity in flux — the sense of becoming someone else while still being yourself.
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.