AF or IB??

Denecia • Soldier🇺🇸Wife💍Mama 👼🏽23.APR.19 👦🏽13.SEPT.22👶🏽09.SEPT.23

I’m four days late today, I’ve taken 3 test and all were negative but they had the white line on them, which I think means it’s invalid (3 pack box of FR). Does this mean AF is coming or could it be implantation bleeding? Also, could the invalid test cause me not to get a positive too? Thanks ladies!!