Need some help!

Si

So I tested positive for pregnancy today! ❤️❤️❤️❤️ 2 days before MP. But all the apps I’ve downloaded to help with due date estimate they’re saying baby should implant in the next few days. I thought if you tested positive baby has already implanted? I have. 26 day cycle and believe I ovulated on CD 12 and on CD 24 now. So the question is, has baby implanted?