12 Dpo - Implantation bleeding?

Hello! I’m currently TTC.

I start noticing a light brown discharges when I wipe on 11 DPO at night time.

And then the next day 12 DPO, In morning I was still noticing those brown discharges when I wipe. And at night on the same day, my panties had brown discharges on them. So I decided to put tampon in, and I took it off before I sleep to see if anything was on it, and I noticed this pinkish blood.

So I wanted to ask if maybe that’s the beginning of my period, or could it be implantation bleeding?