A timer counting down is read as awareness that time for something is limited. Dream books link it to anticipation, urgency, or a wait that is nearly over.
Where in your waking life have you met something like this lately?
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.