Oh itsmyfirst, I feel the same as you. I am 14 weeks and had a mmc last year. It was a blighted ovum, so the baby hadn't developed at all, but I didn't start bleeding until 12+1, so I am still very jittery, despite a scan at 11+2 and 13+2 which were both fine. I really thought after the scan I'd feel better, but I still feel very nervous telling people I'm pg.
The Miscarriage Association website says this:
'Research has shown that if you see a heartbeat at 6 weeks of pregnancy, the chances of the pregnancy continuing are 78%.
A heartbeat at 8 weeks increases the chance of a continuing pregnancy to 98% and at 10 weeks that goes up to 99.4%.
So things could still go wrong and sadly sometimes do, but as long as there is a heartbeat, the risk of miscarriage decreases as the weeks go by.'
www.miscarriageassociation.org.uk/information/ultrasound-scans/
I found that helpful, although as they say there has to be someone who falls into the 0.6%. But the chances are very good. I think that once you can feel movements the worry recedes as you can feel that the baby's OK in there. With DD that was about 16 weeks for me. This one I sometimes think I can feel wiggling in there, but I'm not sure, and have an anterior placenta, so am aware that it takes longer to feel the movements.
Take care, take each day at a time, try not to worry. That's what I'm trying to do! 