Okay friends, help!

Shelby • Mommy of 👶🏼 July 2016. Due with #2 👶🏼 October 2019

Is it possible not to know if you are pregnant past 12 DPO?! According to my Flo app I was supposed to start 9/26 and Glo says 10/4. Nothing yet. I bought some cheapies and they’ve said negative the past four days.... so I need to chalk this one up as a loss and go for next month? Or is there still hope?!