Implantation bleeding or pre af?

Amber

So I am 6dpo and this is following a miscarriage I had about a month and a half ago, a bit before and during my o phase I was spotting but read that means your extremely fertile. 5dpo I started spotting bring red and today at 6 dpo I had a little bit of brown spotting this morning and had since went away. Could this be implantation bleeding?