Brief Answer: It may be a simple upper respiratory tract infecti Detailed Answer: Thanks for your query. As you have cough, wheezing and specially pale yellow mucus production, it seems to be a respiratory tract infection. Get a chest xray complete blood count done. Empirically you can start tab azithromycin 500 mg for 5 days. If the wheezing persisit or if you feel breathless, it may be a sign of asthma and better will be to go for a simple breathing test called spirometry with reversibility. if found positive, inhaled medications will be of great help... Best wishes

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