What do I do next? Help?

Bri • 🎀Brooklynn Laurel 07/12/2017🎀 🧸Blake Crew 12/10/2019🧸 👼🏻Baby #3 02/24/2022👼🏻🌈Due 12/01/2022🌈
I just wanted general opinions because I'm still relatively new at TTC. Here's my timeline. My average cycle is 36 days. EWCM started on Saturday. I had sex on Sunday at 5 am. It's now Tuesday. At 5:45 am today, I got a positive OPK (posting pics below for you to see) on 2 different tests. We're going to try to have sex as soon as he gets home from work in a few hours. My questions are: Could I get pregnant from the sex on Sunday or will it be too late? I'm guessing Wednesday is my ovulation day - how long do I keep actively TTC to catch my ovulation this cycle? And, would Thursday count as 1dpo? Thanks to anyone who responds!