Coughing up blood in a dream is a symbol, not a health sign: it is read as exhaustion, or as something painful you have been holding in that is forcing its way out.
Does the traditional reading fit your dream, or did it mean something else to you?
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.