I went for a scan at 6.5 weeks (i've had 4 m/c's before) and they saw a sac but nothing else. They asked me to come back this Thursday (17th Jan) but I don't know how anything can suddenly appear. They can't diagnose an m/c until the sac is 20mm so is it just that they're waiting for measurements to add up, or do they have any hope that a baby could appear within 10 days? I'm finding it hard to believe - any reassurance or similar stories out there gratefully received.