Hi gals I'm concerned about my dating it seems to be off! 6w1d my baby's bpm were 159 which seems high and its hcg levels were at 67,334. I really thought I was 7w0d the day of my ultrasound, but I heard transvaginal ultrasounds are usually only off by 2 days, has anyone else's 6w baby have high hcg levels or a high bpm or been up to six days off?