When a woman experiences stomach pains at the 38th day of pregnancy, it is important to determine the exact cause of the pain based on the exact location of the pain and its nature. If the pain is in the middle of the belly and is accompanied by a small amount of vaginal bleeding, it is often considered to be caused by a preterm miscarriage or even a spontaneous miscarriage. However, if the pain is on one side of the lower abdomen, and there is also discomfort in the lower back or irregular vaginal bleeding, it is more likely that there is an ectopic pregnancy. If the pain is only on the left side of the lower abdomen and the stool has not been relieved for three days, it is possible that the pain is caused by stagnant stool. Therefore, you can eat more bananas and vegetables to promote the discharge of stool.