9dpo, vfl??

Courtney • 💜 Violet Mae, born May 2021 🦊 Creedence Asher, born December 2018 👼🏻 Angel baby, March 2018 (due 11/10/2018) 🍊 Clementine Everly, born May 2017 👼🏻 Angel Baby, June 2016 (due 3/2017)
I'm 9dpo, and I caved and took a test this morning. I very clearly saw a vvvfl in the first one, so I took another with the same cup of FMU that I used to take the first, but I don't see a line on test number two. Could one be a fluke?