I'm Daniella. I'm 13 at the moment and turning 14 this year. About a month ago, I went swimming like I usually do, after about 2 laps I started breathing faster and faster and never seemed to get enough air, my chest felt really tight when I was breathing in. And that was the first time, I kept pushing myself and trying to swim, and then I started hyperventilating. I got out of the water about quality minutes after the hyperventilation.it was really bad but I managed to calm down. And recently, I've been out of breath from simply running up the stairs, but, it's not like I did any stretching or stuff like that befkre, but it seems strange that I get out of breath from that short of a distance. I know this could be asthma but I haven't been suffering from any coughing or constant chest tightness, then again, there are many things this coukd be like bronchitis, lung cancer, pneumonia, stuff like that. I've always been athletics and I love running around and I'm pretty aggressive when I'm running. I've also been experiencing random bone pains here and there.