A dark, featureless figure is read as an unnamed worry or a part of the psyche not yet faced. These figures are common at the edge of sleep and are taken as a symbol, not a presence.
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.