For like a month been having bad stomach pain whenever i've had a full meal during lunch so what's wrong? skip breakfast all the time. see a doctor?

More info needed: More description of your symptoms is needed but postprandial abdominal discomfort can be due to lactose or gluten intolerance,gall bladder disease,adhesions from previous surgery to name common causes. Try a bland,lot fat diet and if symptoms persist, your physician will take a history,examine you and order appropriate tests in order to diagnose and treat you.