You must have had Antibiotic treatment for Abnormal Chest Xray finding associated with the symptoms you described.
If these symptoms persists and Chest Xray does not improve you r doctor would recommend CT Scan of Chest and Pulmonary Function Test etc.
Nausea and loss of Appetite makes me wonder about abdominal problem also,
Therefore Please follow your doctors advise.
Would you like to video or text chat with me?