I work in health care, and I am going to answer based on that. Anytime you are having abdominal pain it is considered a possible surgical emergency, if it is lasting for more than two hours, or frequents for more than 3 days. You need to see a doctor. There are many things that it could be, and you need to get tested. If they cannot find what is wrong with basic tests, insist that they continue testing until they find what is wrong. It could be anything from ectopic pregnancy, to a irritated bowel.