Update: waiting game...anxious now

Hi everyone. So i posted my condition about a week ago. I had my u/s just a while ago. It turns out the baby didnt grow much, they measured it 6w0d and still no hb. The wierdest thing though is that a 2nd yolk sac appeared, which was not on the previous u/s. I'll have an appt. later with my OB, but since she also did the u/s she briefly informed us that it may no longer be viable. She gave us an option to wait it out. We'll have discussion later. Help! What should i do? Should I wait? This is making me crazy.