What DPO am I?? Average cycle 26-27 days. Regular. Is it possible to be implantation?

I had spotting on 9/1/24. I thought that meant I ovulated early. This morning I had spotting and it stopped. Should I calculate ovulation from 9/1/24 when I spotted or what the app said. I'm not sure how many DPO I am. If it's from the day I saw spotting I'm 12 DPO. but if it's from the date the app predicted, I'm only 10 DPO. I've been tracking my cycles on this app consistently for 3 years now so in figured it would be accurate. No more bleeding since 4 am this morning. I even tried to feel my cervix and no blood on my finger. Not sure if it's possible implantation bleeding or if I should expect AF... Please advise

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