Anyone else not lay 15+ minutes after bd?

My fertile week is coming to an end and I’m sitting here thinking every time me and my hubby bd I get up about 2 or 3 minutes after we are finished. There’s times I got up almost immediately (like 1 minute after) will this effect my chances of pregnancy? I’m just curious because online it says studies show that iui is more effective when the woman lays down for 15 or more minutes after instead of getting up right away. So now I’m wondering if I’ve been doing something wrong..