I am 13 years old. I have had a cough develop somewhere in December of 2017 or January 2018. The cough has not gone away and it's July 18, 2018. The cough was barely noticeable in January, but now it has gotten very noticeable. I realized that I cough every time I was done drinking water, and my cough fades away when I lie down. It does not affect my sleep at all. Sometimes I feel like I don't need to cough, but I cough anyways. My cough has annoyed my family too. My cough comes back when I get up, or doesn't come back for a few hours. But it has never gone away permanently. I don't take cough medicines, because I don't have any for my age. I tried one for younger people, but it seemed like my coughing was worse. It went back to how it usually was the next day. I don't know what I should do. I have no other side effects as well. Please help, I am getting increasingly worried about it. Thanks.