Suggest Treatment For Clear To Yellow Productive Cough And Shortness Of Breath

I have clear to yellow productive cough for two months. Shortness of breath with activity or speaking. PVCs with chest pain, plus two pitting edema to lower extremities and facial swelling. The doctors have ruled out pneumonia, TB, adult onset asthma, bronchitis, pertussis, MI. X-Ray have been clear and sniff test was normal. They still don t know why I m coughing and having difficulty breathing. Chest ct results pending. They still don t know what s wrong with me. Prior to two months ago I was working out five days a week with cardio and weights.