A vague stomach pain in the 10th day of pregnancy is considered the most likely cause of the gestational sac to be implanted. The gestational sac is not yet visible in the uterine cavity and it is not possible to exclude whether the pregnancy is intrauterine or ectopic. If there is no bleeding, take rest. You can go to the hospital to check the blood chorionic gonadotropin and progesterone to make a preliminary judgment. If the chorionic gonadotropin level doubles, it is more likely that the pregnancy is intrauterine. If the chorionic gonadotropin increases slowly and is accompanied by vaginal bleeding, the possibility of ectopic pregnancy cannot be ruled out and should be closely monitored. In case of severe abdominal pain, it is important to go to the hospital in time and not to be careless to avoid danger.