Probably, I caught a cold which continues longest in my life

On December 3, I caught a cold and had a fever. Though I cured the fever in a few days. I have still had cough since then. When I was a elementary student, I used to catsh a cold and the illness continued for a few days or for a week at most. But, I've never experienced such a long illness as this cough(except for pollen disease).
I won't recover from the cough. Congested schedule prevents me from curing the disease.