Maybe Baby?

Sarah • 31 - Mommy to an angel, Iliana - cat mom - baby #2 due 8/21/2020

My fiancé and I just started trying for a baby three weeks ago. We pin-pointed it down to when I was ovulating, did the baby dance (and still do) every day, even used pre-seed. My AF is late by three days and I'm NEVER late. However, when I took pregnancy tests, both came out a BFN. Could I have taken the tests too soon or could something be going on with my AF?