Hi!
Well, if you were my patient, I would have to say that some things don't seem to add up. First of all, most pregnancy tests will not be positive that early, so that seems odd. The fact that the first scan showed nothing and the second scan did show a sac, I would interpret as a good finding, depending upon how large the gestational sac was. A large gestational sac with no yolk sac is not a good sigh.
If you were my patient, I would do a quantitative HCG at this point, and a progesterone level. Depending upon the results I could give you a little more information on the prognosis. A progesterone level over 15 is a good sign. An hcg which is doubling every 48 hours is a good sign.
Waiting for another ultrasound in a week may be hard, but that is what will really give you the definitive information.
Good luck!
Dr B
I was measured at 5 weeks a nd she also found a bleed measuring the same size as the bleed.