Faint BFP then BFN help!

[ChoosingHappiness]

This morning with FMU I had a faint BFP (and a hint of one yesterday too) on an Internet cheapie so tested with a FRER a few hours later to confirm but nothing, not even a squinter! Has this happened to anyone? I thought FRER was more likely to pick up a BFP than an Internet cheapie so does that mean it's likely a BFN?

I would of also that a FRER would pick uo something if the cheapie has as FRER are super sensitive. Have u tried a third brand x

I haven't no, I haven't got a 3rd brand at home and I'm trying not to get obsessive (which isn't really working)! The only thing would be I did the IC with FMU and the FRER a few hours later so not much of a hold

I've attached the photos of the ICs-top from Sunday, middle from yesterday and bottom from today...