Faintest BFP ever?

Thanks for another set of eyes! I got what I think was a vvvfl with FMU on a WONDFO this morning. Took a FRER with SMU, each seemed to have the faintest, don't-look-directly-at-it line. They both showed up well within the appropriate time frame (if they are indeed second lines). I am 6DPO, TTC #3