We had seen two sacs in the beginning but Sac B was smaller and empty at the first U/S so I figured it wouldn't be there the next time. Well the next time it had a yolk sac..and yesterday it had a heartbeat!! I'm floored!! Sac A measured at 6 weeks 4 days and had a heartbeat of 122 and Sac B measured at 6 weeks 2 days and had a heartbeat of 112. So, as of right now, we are having twins!
HOLY CRAP!!! LOL