Oh thats wonderful. They put my early bleeding down to that also- the embedding of the placenta/ baby into the uterus wall or something. And then when I had my huge gush at 12 weeks they couldnt see anything obvious either but thought it was the placenta moving and embedding further, catching a blood vessel. Very scary stuff. I guess all you can do is just get checked out each time. Its very scary xoxoxoxoxox but im glad everything is ok.