Is this implantation bleeding ? I had sex 3&13 days before this strange dark brown super light bleeding started. I know it's tmi but I forgot I put in a tampon yesterday and the picture I'm about to add is all the blood there was from 9 hours

And then the next picture is how the blood started the first day after wearing the tampon for 6 hours

This will be the third day of this bleeding starting today.. I'm so sorry that it's so tmi but I'm BEGGING for help!!! Please no negativity