Implantation bleeding

So I'm currently on cd 20 and I believe I od 5 days ago but now I'm having some spotting when I wipe. It was brown then changed to the pics below then brown again now its stopped. It's barely visible and I don't need to wear a pantyliner. I'm wandering if it's too early for implantation bleeding but af not die until the 27th. This is my first time trying after my mc in April so I don't remember any signs I had back then besides cramping like now and some brown discharge. Has anyone gotten this and had a bfp later?