I am so glad I found this resource. I had a CAT scan for lung cancer since I have just stopped smoking. Came back negative however I have mild emphysema COPD. When I look back I have been developing symptoms of shortness of breath when walking quickly. I am very frightened and I feel like I have brought this on myself. I have no stamina and have been losing weight which I have learned are another symptom. Any support feedback would be greatly appreciated!