if u think she dosent check u well change doctor i knw it stress full going into all that. good luck.
Try to hang in there hun, I know this waiting is SO hard! I also had an u/s at 6 weeks where all they saw was a gestational sac (no yolk sac or fetal pole) by around 7 weeks there was a yolk sac, fetal pole and heart beat!! I think there are even women on here that have had to wait till closer to 8 weeks to see anything. My Dr. was also on the negative side, I think they feel the need to prepare you for the worst. (((HUGS))) The fact that your levels almost tripled is great! Let us know how your next appt goes!
Im scheduled to get another ultrasound next week to see how the pregnancy progressed.