Abdominal pain before menstruation may indicate that menstruation is imminent, because before menstruation, the endometrium is in a period of congestion, and the uterus and pelvis may also be in a period of congestion, which causes dilation of blood vessels in the lumbosacral region and pelvis, and there will be pain or lumbar pain, so you can be patient and wait for menstruation. If you have unprotected intercourse in the same month, there may be a chance of pregnancy, so you can take a test to rule out pregnancy, because pregnancy may also have abdominal pain. As long as you are sure that you are not pregnant, it is normal for your period to be delayed for 7-10 days because changes in the environment, stress, mental factors, and endocrine hormones can all cause your period not to come, which can also cause abdominal pain, so you can be patient and wait for your period.