It could be many thing as sever as your appendix or gallbladder or as minor as gas. The description you gave was vague and short. If there was more info I'm sure someone could pin point the problem but as SassyLassie said it's hard to diagnose you with out you standing right in front of us and without any blood work or other tests being done.
Hope it's just gas, hope for the best but expect the worst.
Your friendly pharmacy tech
Mr_King_Brad
It could be your gallbladder!
Hello,
Well, without seeing you, and knowing more about the pain, it would be hard to discern exactly what is wrong? Have you contacted your doctor about this? It sounds similar to costochondritis, although that is felt mainly between the ribs.
Also, I would ask for a blood test to rule out appendicitis, sometimes this can be a sign of beginning appendicitis, you certainly do not want it to get worse.