maybe someone can help me make sense of this. U/S last week showed no HB when there should have been. betas not doubling but still going up next day, then started going down late last week. Was told I would start bleeding soon and haven't yet. Got a call today that they are now going back up, not doubling or anything, but going up after they were already going down. Sent for another u/s and now they see a yolk sac when last week they saw nothing. This is crazy and a rollercoaster and I really don't think this pg will sustain. anyone else go through this? Thanks!