BB I know what you mean about already having DC. I have 2 DDs, and I honestly thought my youngest would be my last, and then when me and their Dad split up, I had the Mirena in as I had no intention of having more kids, and my DH was very, very anti-more children considering what he went through with his DS.
I blame SIL for having such a bloody scrummy, adorable, baby (shes almost 2 now) and has made DH & I broody - it hit us all of a sudden over summer, but I was the reluctant one due to my reliance on my MH meds, but have been reassured they pose no danger to a baby.
My DSis said to me yesterday: Please don't stop TTC because you've had a MC. Its awful, but... Look what happens when a pregnancy ends with a healthy baby, all the joy and experiences that brings. And it will happen. You've had that before and you can have it again.
For a ditzy 22YO that is possibly the wisest most profound thing she has ever said (and is a single Mum herself to her 4YO disabled son) and I had a bit of a cry.
I said I felt greedy, that I've got 2, DH has got 2 (he always refers to himself as a father of 2 regardless of the face that youngest DS isn't alive) and we are being greedy, wanting more than our fair share.