When is possible implantation

Implantation usually happens about 8 or 9 days after ovulation. So, based on your tests, I find it really hard to judge—they’re dried up, so it’s difficult to tell which one was positive. It’s smart to take a photo of the test right after the reading time. Assuming you subtract about a week from your period, which is when implantation would likely occur, I’d say around October 18th. But everything is just an estimate; you have a long cycle, and everyone assumes a “normal” 28-day cycle. Just wait calmly, you’ll see on your own when it’s positive, and then the exact implantation day doesn’t really matter anyway! You never know it exactly anyway.