So I'm about a week late but my tests are negative

not feeling any signs of AF coming, but I was entering the first day of my last period into the <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">due date calculator</a> just to see and it said Dec 14, 2018

this date is very significant to me.. It's my Dads birthday which he passed away 3 years ago so I really want this to happen when i saw that I was shaking and crying I want this to be real!