Faint BFP on FR 6 days earlier 1 day late for af

Char • Engaged💍 baby boy born 06.10.19🦁💙 pregnant with no. 2🤰💜 3 Angels👼 Dog and cat mother ❤️

Faint pink positive line on First Response 6 days earlier today! But does anyone know why it could be so faint after I’m already late for af? Late ovulation or what?

Thanks in advance xx