Lmp vs Conception Day

Melanie • Im a wife and mommy to 2 boys and we are trying for one more baby ✨ We are a couple who have been through the darkest times and we believe the best is yet to come We have overcome the unthinkable and strive to live our best life together with love ❤️ Pray
Hello When I calculate Lmp (March 1st) I get December 6 but I know my conception day which was March 25 I did not ovulate before March 25 because I was at my dr on the 24
And she tested me on that day and called me and told me I didn't ovulate yet we bd'd on the 25th so I am assuming I ovulated on the 25th or 26th so which date should I use to calculate?