Whooping cough is read as a struggle to catch your breath between bouts. Tradition links it to strain that comes in waves and to something you keep trying to get out of your chest.
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.