Delayed menstruation and the presence of a vague pain in the abdomen is not necessarily pregnancy. Because the pelvic blood vessels dilation, progesterone need to retreat before menstruation will also cause the occurrence of abdominal pain. But there is no pregnancy is to be judged by the way to test, you can buy early pregnancy test paper in about 12 days after intercourse, to rule out the chances of pregnancy. If you are pregnant at this time, you need to go to the hospital for blood tests, progesterone, including HCG, because the abdominal pain is the presence of pre-miscarriage manifestations, is the need to carry out birth control treatment. Again, if you are not pregnant, wait for your period as long as possible. As long as 7-10 days to come are considered normal menstruation, not all menstruation is a good day, once in a while delayed with the month’s environmental stress mental factors, including endocrine hormones will have a certain relationship is not to affect the health of the body.