I had an US Monday morning at 7 weeks ( going off of my LMP) and we didn’t see anything but the sac . I had bloodwork right after my appt with hcg level at 21k, this morning did a second round of blood work and levels were 31k. Dr said it would of been better to have them double for the 49% increase is still a good sign. Booking another ultrasound with the hospital later next week. Has anyone been in this position or know more about the levels ? Also, I have a 34-35 day cycle. Does that change the dates at all since everything is assumed 28 day?