my girlfriend went for a few ultrasounds at around 6 weeks pg, her ob told her she had miscarried, because he couldn't find an embryo anywhere,and they were going to perform a d & c the next day, he sent her for pre-op blood tests, her hcg was really high, and when he did another external u/s, he finally found the bubba!

i think it sounds as though you're preggers - fingers crossed