I just got the call: my beta today was 568. Fine doubling. They even scheduled the ultrasound for Monday April 13th. (WHICH SEEMS LIKE A LONG TIME FROM NOW)-- Good lord, every little twinge in my lower left quadrant makes me worry it is lodged in my wonky tube (very twisty) and that scares me badly and I cannot wait to find out that "it" is in a fine place so I can stop panicking about that particular thing.
BUT for now I will try not to panic, and instead revel in the good news of the day.