I am a 22-year-old male. My weight is 110.23 pounds. Around 50 days ago, I had a sore throat, nose itching, and cough. I noticed a tiny amount of blood with mucus (only two times). I do not know whether it has come from the lung or nose or throat. Then, my doctor told me to get a complete blood count test and chest x-ray (PA). Everything was fine. ESR was a little high, but after some days when I tested again, the ESR also become normal. Then, my doctor prescribed me an antibiotic tablet and Montek LC. After the complete course, my throat pain was gone, but I still had a cough. So, the doctor told me to continue Montek LC for a month. I completed one month's course, but I still have a cough. A cough is sometimes dry and sometimes with mucus. I do not understand the reason for my cough. I am leaving abroad in four days, but my cough is not getting better. What can I do now?