I had a dating scan at what I now know was 4 weeks 2 days (cycle was a bit longer that month, so wasn't sure) and there was NOTHING there... nothing at all. Not even a sack to reassure us. When we went back at 6 weeks 6 days we were able to see the heartbeat - but it was one hell of a wait to get through those 2 weeks

Congrats on your pregnancy and good luck!!!