My firends is eight weeks along...?

She has been wanting a baby for a very long time, and was super stoked when she found she was pregnant, she went for her first ultrasound yesturday and they could not find the heart beat, they saw the baby but said it only looked 6 weeks, but she is sure she is eight weeks along. I have experienced a friend that lost a baby finding out the same thing at 16 weeks, that the baby only looked 10 weeks, and had ped, Im wondering if anyone has experienced this where the baby had been ok, and maybe the ultrasound did not pick up the heart beat, i know it is a long shot, but my friend wont find out anything untill tuesday and Im super sad for her, and Im trying to find some way to give her hope, but i dont even think there is much, Anyone have any positive experiences they may be able to share?