How do you know that you are pregnant? Did you take a pregnancy test or did you come to the conclusion because your breasts are tender? The first sign of pregnancy is a lack of an expected period... but even this is not always a sure sign of early pregnancy. That’s why you always need to take a pregnancy test after you missed your period. If it is negative, then you are definitely not pregnant. If it is positive, you are pregnant but you will need an ultrasound examination to confirm a normal pregnancy. If the ultrasound detects an embryo in the uterus, that is normal pregnancy. If the pregnancy test is positive and there is no embryo in the uterus then you have one of these conditions: ectopic pregnancy, mola hydatidosa or chorioncarcinoma. You can take a pregnancy test and to visit your gynecologist should you need confirmation.