Where is my clear, bubbly phlegm coming from?

How old are you? Are you feeling short of air? My suggestion is to get to a doctor right away!!!!!!! "Bubbly phlegm" can be a symptom of congestive heart failure or pulmonary edema from another cause. I am a nurse who mainly works with the elderly population, and when I see foamy sputum, red flags go up! GO TO THE DOCTOR RIGHT NOW!!!