TMI Photo of Possible Implantation Bleeding

BD'd on CD 5 and CD 11- 25 day cycle. Unknown ovulation date but glow predicted CD 6-CD 11 as most fertile days. Today is CD 15- which could be anywhere between 4-9 days post ovulation. Is this implantation bleeding? Don't expect AF until Oct 4 so I would be right in the middle of my TWW!