I been having stomach pain since childbirth 3 years ago. whats wrong?

Anxious mother?: Stomach pains can be caused by so many things--i would refer you to the excellent healthtap answers on the subject. However, the temporal relationship of motherhood to the onset of discomfort, and its longevity over several years without other alarm associations, raises the possibility of a "functional" process. Best to seek evaluation, especially if weight loss, vomiting, bleeding, fevers, etc.