Hello! We found out we're expecting our second child, my daughter is o…

Hello! We found out we're expecting our second child, my daughter is one and a half years old, we're very happy about the news. I have a question, I can't understand my due date, I downloaded three programs, they all show different things. The last period started on August 10th, 2022. Maybe someone knows how to count or is good at this? By the way, the pregnancy test showed clearly on day 9 of delay, it was September 16th, 2022.