Sometimes home kits aren't accurate. If you are confused, you can call your hospital or gynac's clinic to schedule a beta hCG blood test, which is much more precise.
If your period is delayed by more than a week and the test is still negative, please consult your doctor. It could be due to hormonal imbalances or cyst issues, which they can check through a simple scan or blood test.
It could be that you tested too early! My tracker app showed my fertile window, but ovulation can shift, so the hCG levels might be too low to detect yet. Try testing again in 2-3 days using morning urine.
I got a negative test first too, but my period was still delayed. Have you missed your period date yet? I waited for 4 days after my missed date and then got a positive.
Maybe the baby is just playing hide and seek! Seriously, either it is too early or your cycle got delayed due to stress. Take a deep breath, wait for a couple of days, and try again.