Thanks for your question on Health Care Magic. I can understand your situation and problem. Yellow sputum us suggestive of infective etiology. Since you had pneumonia, possibility of recurrence of pneumonia is more. So, better than consult pulmonologist and get done clinical examination of respiratory system, chest x ray and sputum culture and sensitivity report. Repeat chest x ray is needed for the diagnosis of recurrence of pneumonia. Sputum culture will identify the causative organism. Sensitivity report will guide us about effective antibiotic treatment. By these, inappropriate use of antibiotics can be prevented. This will prevent drug resistance and fasten the recovery. So consult pulmonologist and discuss all these. Hope I have solved your query. Wish you good health. Thanks.