Hello and welcome to HCM.
Thank you for your query.
The urine pregnancy
kit is normally advised for individuals who suspect pregnancy. This test is advised at least 20 days after the last sexual contact or/and on the first day of the missed period.
The test is said to report false negative results when not conducted properly or taken too early. I request you to repeat this test on the above mentioned date and again after 2 days, for a total number of 3 times to completely rule out pregnancy.
Once pregnancy is ruled out we can discuss other possibilities.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications. I would gladly help you.