Negative? FRER photos

Lindsey • 🤰🏻👼🏻 December 2016 🌈👶🏻 August 2018 🤰🏻🤫 March 2020
I'm not exactly sure what I'm looking for by inverting these. I'm assuming they both are negative but the bottom pic looks different to me.
Thoughts? Insight as to what I'm looking for?
No sign of AF (was expected Sunday 8/7), some strange symptoms, but BFNs with FMU since.