The spiral is an ancient image of growth that keeps returning to the same themes at a new level. Spiralling inward is read as going deeper into yourself; spiralling down, as a feeling that events are speeding beyond control.
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.