I am 66 year old male, pretty active, and while in line at the post office, I quickly sneezed (a big one). While inhaling for the sneeze, I bent over as not to sneeze on everyone and it felt like someone jabbed me with a long knife in my side under my rib cage. I could hardly take a breath. I regained my cool in a few moments, and moved slowly outside, and slowly to my car. That night, I had difficulty moving without the stabbing pain. I had to sleep in a chair with pillows. 1 week later, the pain has subsided alot, and it's pretty much business as normal, with still tenderness internally using external pressure in the area. Can a sneeze do that? I guess it can, but what was it that caused the pain, and where does the pain come from? Should I have it checked out?