Implantation bleeding?

Kelly

Okay so I know implantation is kinda rare and I didn’t have it with my first but could this possibly be?

I had my period the 8th-12th and then had sex the 13th,14th, and 15th with no form of contraceptive or pulling out. I didn’t think i could be fertile that soon after my period and still not sure how common that is. I just had this yesterday and the tiniest bit this morning but this was the darkest. Is this what it looks like?