Recently, I am experiencing a weird cold and cough. I mostly get dry cough, but this time, I have a lot of mucus production, and a lot of cough. I had taken many medicines (since a week I guess) Yesterday , my cold and cough vanished in an hour or so when I was out with my friends. But when I was back in my room, it was so bad that even my voice changed. I am not understanding what's wrong. Today, the same thing happened again. I had a very bad cold and cough since morning, but at night, suddenly, It's gone, Not sure what's happening. Please help. It's not the usual thing to me. (I didn't have fever. It's just cold and cough)