It takes about 6 to 8 weeks of menopause and an ultrasound examination with a doctor to determine whether the pregnancy is twin or single.
Although a woman can take a blood and urine test to determine whether she is pregnant or not, it does not determine whether the pregnancy is a singleton or a twin. Usually, ultrasound can be performed 6 to 8 weeks after the last menstrual period to determine whether the pregnancy is singleton or twin.
If the examination time is too short, it will not be able to detect the pregnancy sac, let alone determine whether it is a twin or a single fetus. Therefore, after having unprotected sex, women can take a certain interval and then cooperate with the doctor for the examination.
You should relax and go to the hospital for regular checkups. Maintain a good routine, need to have enough sleep, not to stay up late.