A week earlier than we thought

A

We went into my first ultrasound thinking I was 7w1d and it turns of baby is measuring 6w1d instead. Heard the heartbeat, but heart rate was only 97bpm which is a little bit low.

Going back next week for another U/S to make sure everything is good and baby’s heart beat is progressing.

Trying not to stress. Does anyone have a similar story about baby with lower heart rate where baby turned out healthy and strong?