Pregnant Again

Daisy

So I took out my Nexplanon on July 16th my first day of my last period was July 4th-14th.

Took a pregnancy test August 10th positive!!!

But .....

I put that I’m pregnant on the app and it says 5 weeks because my period but I don’t believe that because I just took out the implant three weeks ago.

Can someone help me !

How do I calculate my real due date?