Last week I had my first ultrasound. My HCG had gone from 7500 to 16000 in 48 hours and from my LMP I should have been 7 weeks 6 days, but the u/s showed just a sac, no yolk sac, no fetal pole, no heartbeat.
I was online constantly researching u/s's, fetal development, and what I should have seen (the fetal pole, the yolk sac).