The first thing you should do in this case is to go to the hospital for an obstetrical ultrasound, and pay attention to the length of the cervix and whether the opening of the uterus has opened up. If you are 14 weeks pregnant with stomach pain, and the ultrasound shows the shortening of the cervical canal and the opening of the uterus, this situation is considered more likely to be a pre-eclampsia miscarriage, if you plan to have a baby, you should be given inpatient fetal preservation treatment, 14 weeks pregnant with fetal preservation drugs can be used magnesium sulfate to inhibit contractions. However, some people are not sensitive to drugs and may have a poorer effect on birth control, which may lead to miscarriage. If abdominal pain worsens or vaginal bleeding occurs, you must inform your physician in time, and if necessary, do a vaginal examination to see if the embryo is expelled.