opinions

Ka
I am very heart broken right now.  Went for my second ultrasound after seeing 2 sacs (1 empty)  and 1 baby with a faint heartbeat at 6 weeks,1 day. 
Went back today at 8 weeks, 3 days. 1 sac was still empty and the other had 1 yolk sac but no baby.  
Think I have miscarriaged but only had 1 small bleed (red blood in a very short line) and none since then.
Cant get to my doctors until Friday to discuss the ultrasound technition results. 
 Has anyone had anything similar and it all turned out ok? 
Thanks