Ttc help!

Fiance and I have been together for 6 years and are getting married in a couple of months. Yay!

Only issue is we have said we want to start trying again for babies after having two miscarriages but he can't seem to stay hard for very long and takes even longer to cum. I've tried everything but it seems he is not interested which is getting me down.

He says he loves me and finds me attractive but I'm just not feeling it.

I've tried talking to him about it but he shuts down. How can we try to conceive if we can't even have sex?

Any advice will be helpful!