The stomach pain, it is best to observe and see, may be soon to menstruation, consider the symptoms of menstruation, generally do not worry, but if the abdominal pain is serious, menstruation delayed for a week, do not rule out pregnancy, may be ectopic pregnancy, etc., it is best to go to the hospital in a timely manner for ultrasound examination, early pregnancy test. In addition, gynecological inflammation may also cause delayed menstruation, pain in the stomach and other symptoms, it is best to do routine examination of leukorrhea, etc.. If gynecological inflammation, it is recommended that reasonable use of anti-inflammatory drugs, and at the same time, it is recommended to pay attention to hygiene, you can use lotion to wash the vulva, change underwear; if ectopic pregnancy, it is recommended to go to regular hospitals for timely surgical treatment, pay attention to rest after the operation, strengthen the diet and nutrition, and it is best to not eat stimulating food.