Thanks for your query.
I will try my best to provide you with best possible professional recommendations to your questions.
test should be done at least week after expected date of menstruation
False negative readings can occur when testing is done too early. Quantitative blood tests and the most sensitive urine tests usually detect hCG
shortly after implantation
, which can occur anywhere from 6 to 12 days after ovulation. Less sensitive urine tests and qualitative blood tests may not detect pregnancy until three or four days after implantation. Menstruation occurs on average 14 days after ovulation, so the likelihood of a false negative is low once a menstrual period is late. It is nearly 98% accurate if used according to the steps as mentioned in the template given.
I advice you to repeat the test and preferably use the early morning urine sample.
Yet again, I do hope that you have found something helpful and I will be glad to answer any further query.