Since a couple of months back, i noticed asignificant difference with myself. sometimes i had difficulties in breathing, especially during the night or when its cold. sometimes out of the blue i will start coughing. its going on like this. i went to see a doctor and she said there's nothing wrong with my lungs. i've gained weight recently, from 48 to 55kg. is it simply because my body is out of shape, or something is wrong with me? i'm too embarassed to see another doctor, because i'm scared to make a big deal out of nothing. please help.