For a long time i have pain in my stomach that come and go, and in the last hour i started to feel a little pain from my belly button and my stomach is a little hard, please help.. ?

Doctor can evaluate: If one has worrisome tummy pain, and is normally in good health, the possibilities include: heartburn, gall bladder or liver problems, pancreatitis, constipation, appendicitis (usually right lower quadrant), bladder or kidney problems, gut anatomy variations, etc... Most people with "moderate pain," more than mild pain, should get a doctor's evaluation to be sure it is not something serious.