Well I'm due 9th of October and I had sex on the 2nd of Jan. So u made the baby 5 days before the 2nd of Jan. If that helps
There's no way u can find out when u got prego exactly...a healthy sperm lives for 3 days inside you... so it's never sure that u got pregnant when u had sex... All the best to you & take care!
You can't always tell exactly as the sperm can live up to a week in your body so may not have been the days you had sex that you conceived.