mrsn Yup, yup, to that removed, pragmatic view. Who wouldn't have slipped into that stae in your shoes - be it acceptance, denial, self preservation or a combo of all of them at differing times that takes you there.
But and I hope I'm not speaking out of turn here: given what you said yesterday, I think I should be ok there's something about the way you fell pregnant despite it all that is saying maybe, just maybe, it's not quite time to throw the towel in finally.
Yes, you're 42 (recently, or are you nearer 43?) but if you've had all but every test 'they' can come up with and they've come back 'normal' then I think you've got a chance. Maybe even a good chance if you want to have the energy throw yourself at it. I'm assuming your FSH wasn't horribly high? Couldn't be, or else you wouldn't be 'unexplained' infertility. So, your ovaries must work ok/you are not entering the menopause.
So! You could 'try' getting you and DH into tip top physical condition - this will mean taking supplements, some clinically 'unproven' (such as the high dose b vits I'm an advocate of) but anecdotally have helped many women with unexplained infertility (and actually, in IVF high dose b vits taken by patients when they stim produced more high grade eggs, so that IS some clinical evidence). Your body clearly doesn'y have an issue getting pregnant - so it would seem logic would dictate improving the quality of your eggs, right?
As I type this, though, I recognise the leap of faith it would take to say, actually, we are going to try this. Especially not knowing for sure it would work, especially knowing that potentially all that might happen is you set yourself up for another mc. I don't know whether it's something you can properly think about or if you just go with how your gut feels.
I'm guessing IVF would be out of the question for you?
And I will stop throwing questions at you/seeming 'ever-the-optimist' (which I'm really not! But something about you... I dunno, I just feel all is not lost and I'm uncharacteristically optimistic for you!) and shut up!
marff you may, or may not, recall my wobbles, quite bad ones, too, as I went into my LP each month... suddenly convinced I didn't want to ttc. I think it's a variation of 'normal' (ha!) and obviously a self preservation thing. Obviously if it becomes the pervading thought through most of your cycle then it woulod be fair to say it is truly how you feel. But I don't think you're quite there, yet, eh?
poppy!! Yay for you and your pampering ahead. Lovely to 'see' you. Please do report flavour of the baby once you find out 
sue Well... I guess it ain't over until I start singing! Ok, I'm not actually fat but at 35 weeks I sure look it! (although 
for you tits at assuming your BMI, and assuming unflatteringly! Not to mention what it would mean with regards to their 'fears' for you as the pregnancy continues...). Hopwfully the dr will refer you for an early scan to get a better idea of what is happening?
I... ok, I've been waffling on. I spoke to the bereavement midwife on the phone today for half an hour and she's making me an appointment with my consultant next week plus a face to face appointment with her for may 1st. I feel odd... saying stuff to her, fears, anxieties I have, it's all made me feel weird. Because mostly I push it all down, y'know? But, yeah, the ball is rolling and OMG! My due date is only five weeks away (and I'm measuring 40 weeks - joy)