Implantation bleeding?

On 12 dpo I had sex, wasn’t rough or anything but after I had light pink mucous discharge that did not last long at all, just a few times while I wiped 1st pic was the last of it. Slight cramping, sore boobs. Since then (14 dpo) I have had thick snot like discharge, 2nd pic is nothing compared to what it was the time I wiped before. Is it to late for implantation or just normal before period? I never spot before my periods and don’t normally bleed after sex. Took a test this morning BFN. Help??