Chippy, I've posted this in reply to your post in 'Dadsnet' but now I've read so many other replies here wanted to add to them.
I'm so sorry to hear about yours and everyone else's experiences. This is exactly what happened to me 4 yrs ago, my pregnancy hadn't developed but we didn't find out until the 12 week scan, then I went back to hosp for erpc the next day.
The worst for me (and I think for DH too) was that I had no indication at all and was looking fwd to going home from the scan with pics of our baby. And also, until that point, I had felt really pregnant - sick, incredibly tired. The docs said this was because I still had all the pregnancy hormones. I felt really cheated!
It was my first pregnancy and we'd both been so excited. At home we hugged a lot, had two days completely on our own before we saw people and talked so we both knew how we felt. It might not help you now but it is extremely common.
And if it's any consolation, I gave myself 2 months before trying again and I got pregnant straight away. Our gorgeous DD is 6 mths younger than our first baby would have been.
It's been a couple of weeks now so I hope your DP has recovered from the operation and is starting to feel a bit better overall. Just make sure you keep talking to each other....but lots of wordless hugs sometimes all that's needed!
Take care of each other....and good luck for the future.