I'm sorry you are going through all this stress... If you are going to have a miscarriage it your bleeding will prob increase. mine did. perhaps you had some kind of bleed outside the sac. I have been reading a few posts about that lately.
I'm sorry as this may be TMI, but I hope it helps some who think may have had a miscarriage...
When I had a miscarriage last year I passed a few clots & a lot of blood. The day after EXTREME cramping & contractions I passed the sac. It was larger than my fist & looked ecactly like they do in the ultrasound pictures at 7-8 weeks. I was supposed to be much further along than that, but things had stopped developing.
So, in my case it looked exactly like the pictures you can see at 7-8 weeks. I have also heard of passing grey matter...
During the sixth week the baby's heart will start beating so at your next appt you can look fwd to that. Sorry I don't know anything about the rest