Testing based on ovulation or expected period date?

Ti

I think I’m 11/12 dpo based on my OPKs. I’m extra so I use multiple tracking apps and all of them have my period starting on different days. One says Friday one says Sunday and the other says Monday. My last two cycles started on a Monday so I’m assuming Monday will be it? But that will be 15/16dpo.

Is it too early to be getting a positive based on my expected latest period date or does it matter more when I ovulated more?

I’m totally over analyzing everything I know but I’m impatient and am quickly getting discouraged. 😔

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