OPK help

Shahd • 💏 Happily married 👶🏻 Baby #1 born Feb 2020 (Emergency C-section) 👶🏻 Baby #2 born Jan 2022 (VBAC)

Hello ladies, so <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> initially said that my ovulation day is on 2nd of June, and based on this I was not doing much of BD in the previous days, and all my OPK tests were negative, except for yesterday it was positive! So the app automatically changed my ovulation day to today!!

Does this happen to anyone?