Ultrasound 6w3d

Kristin • Momma of 2 miracles.💙💙 Endo Warrior🌼
Had first ultrasound today, fetal pole (I hate calling my baby that) measured 3.3mm, and dated me to be 6w exact. Going by LMP, I am 6w3d. We could see the yolk sack and the heart flickering on the screen, but she said we wouldn't be able to hear it yet. She didn't even bring the sound frequency bar up to try to hear the heartbeat. Has anyone had this happen where you can see the heart flickering but were unable to hear it? I also had HcG levels checked but won't know results until Monday. I feel like I will be so nervous through the whole pregnancy, hoping everything is okay.