You will be pregnant one to two weeks after having unprotected sexual contact-assuming you had unprotected sexual contact at a time in your cycle when you were most fertile. In other words the human gonadotrophin hormone will have been released into the body for the survival of the pregnancy. The two weeks is the time it takes for the sperm to travel and meet the egg in the fallopian tube and fertilizes it. it is after fertilization that the egg will travel into the uterus for implantation, after which this hormone is released. When it is released, you can be sure that a test of your blood and urine samples will result in a positive test. This should be accompanied by the pregnancy symptoms of missing your regular monthly period. Since there is no uterine lining to shed, you will not have your regular periods. Still though you may have what may come about as periods which may mislead you. This bleeding is called breakthrough or implantation bleeding that happens when implantation takes place in your reproductive system. Other symptoms include morning sickness and breast tenderness, which are also a result of the presence of the human gonadotrophin hormone in your system.