Thanks for the good wishes everyone, unfortunately it's bad news for me - missed miscarriage 
large empty gestational sac. Apparently my body did a good job of trying to sustain what it thought was a pregnancy that ended ages ago.
Am waiting for a phone call to inform me of a date for EPRC, and been told to go to A&E if it starts before I get to have it (which I think may happen, as I'm getting cramps now)
OH and I are both gutted, and decided while waiting for the scan, that if it was bad news that'd be it, no more TTC. But when we spoke to the nurse afterwards, she said to think about and if we decide to try again, then to take baby aspirin, to see if that helps prevent another MC. Of course it won't help if it's just my old eggs.
I've had a bit of a cry, but right now I'm numb and kind of relieved to know it's over. I've been signed off work for two weeks, and also have two weeks off after that for my wedding ... so a month off work to recover and I'm going to focus on my wedding to hopefully prevent me dwelling on things and then needing to go back on anti-ds.
Good luck to everyone else, I think I'm going to hide all pregnancy/ante natal topics for now ... thanks again for the handholding and hope to see you all around elsewhere on the site. xx