[Kakashi]

A few years ago, I sometimes (around 4 or 5 times per year) had sharp pains in my chest cavity. I'm not sure what the cause was, but it seemed to only hurt during deep inspiration (breathing in). It didn't last long but it felt almost like a small knife pierced my lungs. Over the years, that sharp pain has become less and less frequent. That was at 17 years old. Has anyone else experienced similar problems at that age?

Background info: I was quite late going into puberty, so once I did, my body started growing very quickly.