After having intercourse during ovulation, if there is pregnancy, there will be a slight stomach pain, accompanied by white blood, which is the earliest symptom. At this time, if the HCG value is higher than normal, the early pregnancy reaction will occur about 20 days after intercourse, with nausea, vomiting, weakness, and drowsiness, which are normal pregnancy reactions. In this case, you should pay attention to keep your mood relaxed, don’t have too much stress, try to eat lightly and pay attention to rest. After pregnancy reaction, you can have an ultrasound examination to determine the presence of the pregnancy sac.