Can’t get prego cuz he won’t stop sexing me!!

I know this sounds super weird and doesn’t make sense but hear me out. I recently found out that having sex after ovulation can potentially interfere with the implantation process. The reason I believe this theory is bcz last month I had finally gotten pregnant after trying for 3 years. But the reason why I think I got pregnant was bcz right after ovulation we were arguing and avoided each other for a week. Then I became pregnant, but after we made up we started having sex again and I ended up having a miscarriage..

What do you ladies think?? Is my theory valid?

I want to test out my theory but he doesn’t want to stop having sex. Lemme know your thoughts on this!