have this very sharp pain in my chest on the left side and it has happened to me for about 2 years now. I read online that it is called Precordial 'catch' syndrome and very common in teenagers, so I wasen't too scared but it happened yesterday really intensley and it hasen't gone away since. The pain declined quite a bit, and today it was almost gone but about 10 min ago I streached my arm and the pain came back more intense then ever. It hurts when I laugh or breathe deeply.
Any advice?