Hey Sukie, just my experience fwiw...
I had a 'threatened mc' with DD1 at 14 weeks, a really big bleed, so bad we were sure we'd lost her, and had then 2 months of bleeding on and off after that, and a few other worrying things. But she got here safely in the end in Dec 08.
Then I had a mmc Nov 09, found out at the 12 week scan with ERPC 3 days later, so you have my sympathies, I know how horrid it is. I think as my first pg had some difficulties it wasn't such a shock as it could have been, and I'd been trying not to get excited until after the 12 week scan at the earliest.
I really wanted to start TTC asap (as I'm in my mid thirties), but my fertile time was over Christmas, and we were staying at IL's so we left it that month, it wasn't practical (!). And then I fell pg the following month, Jan 10, and had a few early scans, and it was such an easy pg (apart from the worry in the first 4 months) - so different from DD1 - and DD2 arrived last Oct.
So you never can tell, its just a case of hoping it works out. I think its a hard balance of trying not to get too excited or worrying intensely when you do fall pg, very hard indeed. I know I'm lucky. And I wish you lots of luck x