Advice

What are your advice on not putting too much pressure and performance on your partner when trying to conceive? It seems to always be a problem everytime we try baby making. It's so frustrating and it's like I'll never get pregnant and will keep missing the window! It's already hard enough with two little kids. I just want it to be causal and just to randomly have sex during my fertile week and not test OPKs. Idk what it is, this time I didn't even say anything but just wanted us to try having sex during the fertile week and he still couldn't perform!? Sigh, idk what to do anymore. Help!!?