I am a 27 year old male, in decent health 6ft tall about 175.

I have been expericeing a dull and kinda of buring pain in my left side near the bottom of my rib cage, it appears at random and i have been unable to locate any triggers. When i experience this, i feel really bad and tired. I have no fever, or anything like that. Bowel movments are normal as well as urine. This is unaffected by exercise, and normal activities. it sometimes feels like the pain radiates all over my left side and chest. 

Anyone have any ideas or suggestions?