I totally understand how you feel, Wotsits. I swing between feeling absolutely devastated with tears welling up in my eyes constantly, and having a 'don't care and can't be bothered' attitude, just because I'm so sick of thinking about this.
I'm 42 now and feel the same as you about my age, too. I feel like if it didn't happen when I was 41, when we started trying, why would it now when I'm even older?
Sorry - I probably haven't made you feel any better, but I know that for me it does help a bit to know that I'm not the only one.
I'm really glad you've posted this because I'd somehow missed on the other thread that like me you've been trying for a while without any success at all. :-)
Objectively though I do agree with ThirtyNineWeeks above who says 'KEEP GOING'. After my recent IVF I think I can see what we're up against. Out of my 4 embryos, 2 developed to 5 days but obviously those last 2 were no good either. They did tell me though that the quality seemed to be fairly good.... which leads me to wonder if it really is just a numbers game. Maybe we've both conceived several times in our year + of trying, but the quality's just not been quite good enough to make it all the way.
So let's both try to keep going for a bit longer with a bit of hope. If either one of us gets there, it'll be really encouraging for the other!!!
And in the meantime, let's hope a few more encouraging stories are posted here! :-) :-)