Ttc help

Samantha
So I recall having sex with my SO on my fertile week just not the exact days. I know your not suppose to move right after, and I try not to but o have a 4 year old too so staying put is a challenge. My question is, how much of a differance does it make? Getting up VS laying there for a few min, etc. 
been trying since 2/2016. 😐