If you have not had your period for 3 days, it is possible that the test may not be accurate because at this time, even if you are pregnant, the fertilized egg has just been laid and the concentration of HCG secreted in the body is relatively low, especially in the urine. At this time, if the urine test does not show a (+) result, it is recommended that another test be done 5 days later using the morning urine, and if there is a (-) result of one bar, then there is no pregnancy. It is recommended to take progesterone orally to give menstruation, usually for 3 consecutive days, and then 3-7 days after stopping the medication. It is also recommended that if the test is a bar on the 3rd day of menstruation and you are anxious to know if you are pregnant, you can go to the hospital to have a blood test for HCG, if the value of HCG is >10mIU/mL it means that you are pregnant, if it is less than this value it means that you are not pregnant.