Yesterday I went in for an ultrasound at 5 weeks 6 days since lmp my hcg was at 4121. The ultrasound showed a “possible gestation sac and possible yolk sac” but the ultrasound tech said the sac was too small to measure. My doctor called me today and wants me to go in next week for another ultrasound because she is worried about how small the gestational sac is for the age. Now I am stressing out. Has anyone had this happen?