I had a ultrasound today (external) and according to the sac measurments I am 6 weeks 2 days pregnant which also coincides with my HCG levels. I was sent for an ultrasound to date my pregnancy cause I hadnt really taken note of the date of my LMP. But anyway at the ultrasound all that could be seen was the sack and the sonographer told me that is was normal not to see a heartbeat at this stage due to the embreyo being so tiny. Is that right? God I hope so.