Pregnancy test kits have two lines....one at c and one at t. If only one at c, then test is negative for pregnancy, if two lines are there, test is positive for pregnancy; if one line is there at t or no line is there , then test is invalid. There are chances of pregnancy even when intercourse occurs in safe period. And pregnancy test can be positive even after 16 to 20 days of last intercourse.
Health Tips
kindly consult doctor for various contraceptive methods and stay safe!