Coughing up blood help?

Coughing up blood is a symptom of some other problem. Unless the blood is hy or coming up in large enough amounts to cause a concern about blood loss, coughing up blood itself is not a health risk or cause for concern - its the underlying causes that might raise concern. The most common causes are bronchitis or bronchiectasis, which are known in your case. The docs have already ruled out most other potential problems and the CT scan will catch any remaining possible causes that can be readily detected. The docs do seem to be concerned about the cause of this since they are still looking for other possibilities.