someone help!

Melissa
I had a miscarriage on 9/11-9/17.. I saw the embryo pass and everything.. come 5 weeks later, positive pregnancy test and and Ultrasound indicating an empty sac about 2.1mm which measures to four weeks.. HCG is at 32.6 on 10/16.. going to check them out again tomorrow but could I have passed the embryo and not the gestational sac? I haven't bled or anything since 9/17 and now all of a sudden I have sore breasts.. anyone been in a situation like this??