Implantation or spotting?

sm19

Friday-Saturday (11-12 dpo) i had on and off spotting of red and brown blood. It was only when i wiped, and not everytime i used the washroom.

This morning (13 dpo) i took a hpt and it came back clearly BFN.

If it was implantation bleeding have i not waited enough time to test?

Or it is pre-period spotting.. as it did have red blood? Ive heard implantation blood is more pink or brown.

Thank youu!