Implantation or af a bitch?

K

Im currently on cd30 12dpo. This morning and this evening I noticed some pink/brown super light spotting. This morning had a tiny drop of red blood too.

I have just stopped bc and it's been years that I've been on it. Glow still has me with a period in two days however.

Is it possible this is implantation bleeding or is it more likely AF on the way?

Tests say BFN right now.