After fertilization, it takes about 6-12 days for the fertilized egg to implant in the uterus. If you don't get your period on the 2nd day as expected, you can take a pregnancy test on the 8th day to determine if you are pregnant. This timeframe allows enough time for the hormone levels to rise and be detected by a home pregnancy test. However, keep in mind that it is always best to consult with your doctor for personalized advice based on your specific situation.