A vague pain in the stomach, farting and not having a vacation are related to an irrational diet or pregnancy. 1. Irrational diet: eating too much gas-producing food, because the food mix is not reasonable to cause abdominal pain, intestinal peristalsis increased and farting, delayed menstrual period. 2. Pregnancy: Consider how long it has been since your last vacation, and whether or not you’ve taken proper precautions during sex. Under normal circumstances, it’s normal for your menstrual period to be a week early or a week late, because your menstrual period can be affected by the environment, climate, or your emotions, and all of these influences can lead to a change in your menstrual period. 3. Dysmenorrhea: Abdominal pain will come soon after the period, and the period will come after a few days of abdominal pain. Cold in the abdomen can lead to heavy farting. 4. Gynecological diseases: Including gynecological diseases such as cervicitis, cervical erosion, adnexitis, pelvic inflammatory disease, pelvic effusion and so on, all of which can cause pain in the abdomen. However, the reason for the temporary absence of menstrual period may be that the menstrual period is pushed back. 5. Diseases of the intestines: such as enteritis, intestinal obstruction, intestinal spasm and other diseases. Due to the relative postponement of the period, abdominal pain will occur. Therefore, keep your mind relaxed, don’t be overly nervous, pay attention to keep warm, pay attention to rest, ensure sleep, if you have not had your period for more than half a month, it is recommended to go to the hospital for consultation.