Help 🤯

Bronna Nicole 💋 • Boy mom x2 🐻🩵 Heart Momma ❤️‍🩹❤️‍🩹 https://linktr.ee/bronnanicole

So i got a Positive OPK test on June 27th. When do i start counting DPOs? Do i start on the 27th as Day 1 ?? Or the 28th as Day 1?