Sorry your scan wasn't good news as expected. Unfortunately it sounds most likely that you're going to miscarry. :-( I really hope I'm wrong and you just ovulated later than normal but that seems less likely with your early BFPs. Do you have an appointment with the Ob to discuss things? And are you booked for a repeat U/S? I think that will be more helpful than seeing another GP.

Really sorry if things don't turn out the way you're hoping.