Sometimes I think you have to say something very simple but in a very calm manner to get through to people. Like, "it might be God's will, but do you know what, right now that doesn't really help much". Then turn round and walk away. When/if the person tries to continue the conversation or even apologise tell them no, you don't want to talk about it and move onto something completely banal and pointless like the shape of the clouds in the sky.
I found things like that usually stopped the comments. Tell them the doctors have told you you can't have kids and that your unsuitable for IVF (if your not too superstitious about tempting fate). It would soon stop the 'when are you....' questions.
Hope you all find your own ways of dealing with (sometimes) well meaning individuals who only make things more difficult.
I'm still fending off questions and as I know I am expecting now that's a different side to the same coin. I thought I'd escaped it!

