A parking garage of many dim levels is read as plans and energy stored away. Being lost between the levels is traditionally a picture of confusion about where you left your momentum.
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.