What is the earliest you experienced implantation bleeding after conception?

I ask because I have had some spotting today and mild back cramping and when I used the restroom I had some pink spotting over multiple wipes (see attached pic). My period isn’t due for 11 more days, I’m cycle day 23. I don’t want to get my hopes up because I’m only 8 or so days past conception, which is still in the window (american pregnancy association says it can happen between 6-12), but I’m skeptical as it just seems too early.

Thus, I’d be very grateful if you all could share when you noticed your implantation bleeding and if you think that’s what my picture looks like as well.

Thank you!