The results of an early pregnancy test will most probably read negative. This may lead to you doubting the quality of test you have used or your own use of the test. While it may be true to some extent, it is always good to improve the chances of getting a positive result by taking the pregnancy test two weeks after the unprotected sexual encounter. Some other dynamics include shopping for a test that is reliable and reputable and also making sure you have performed the test very carefully to be devoid of mistakes. Those matters aside, the taking of the test two weeks after the last unprotected sexual encounter increase the chance of getting pregnant. It is at this time that pregnancy hormones will have flooded your system for the preparation of the pregnancy. Since these are the hormones that are tested for by the pregnancy test, you will most probably have a positive test two weeks later rather than a few days later. It is important to look out for the other symptoms of pregnancy like the lack of menstrual periods and general body fatigue than others. If you also have morning sickness, you are most probably pregnant.