If you have regular periods, you can use a pregnancy test about 7 days after your period is delayed. If the test paper shows two bars, it means that the test is positive and the possibility of pregnancy is very high. Afterwards, you have to go to the hospital for an ultrasound to rule out intrauterine or ectopic pregnancy. If the pregnancy is intrauterine, the gestational sac is normally developed and only then can the pregnancy continue. Another way to confirm pregnancy earlier is to have a blood test for human chorionic gonadotropin at the hospital. If the blood level is elevated, it means that you are pregnant. This test is currently a more accurate and earlier method to detect pregnancy. Usually you can go to the hospital 8-10 days after intercourse to have your blood drawn, but this method has limitations because you have to go to the hospital for the test and it is more expensive.