I have 7 days until I can take a pregnancy test my Ovia App says. I got anxious and took one today,…

I have 7 days until I can take a pregnancy test my Ovia App says. I got anxious and took one today, it was the $1.00 test from Dollar General. It came up negative, could I have tested too early? I had sex on July 4th, and July 6th. My fertile period on the Ovia app was July 6th - 11th. The day I ovulated was I believe the 9th or 10th. On the other APP I have called P Tracker Lite it says my fertile period was July 4th - July 10th.