Was this really our month?!

Sierra • Happily Married 7.20.18 💍 Due with our first baby September 2020! 👶🏻💜

I feel like I am in complete shock right now. This month made a year we have been trying. I just took this with FMU, I did get some on the display window though, would that make it invalid? It is 3 days before AF, I plan on testing again tomorrow.