At irregular intervals, i get what feels like a very sharp, stabbing pain in my left side, to the left of my stomach. Ideas have been thrown around like it could be stress or appendicitis, but the appendix is on the right side, and as i mentione earlier, it happens at irregular intervals, sometimes for a few seconds, the longest being 45minutes nonstop. When it occurs i find it hard to breathe, or stand up straight or walk. Iv been to the hospital about it, had a few scans and nothing has shown up in any of them. Does anyone have any ideas what it could be, and how to help avoid getting this pain again in the future? BTW iv just recently turned 16, if that helps narrow anything down.