Heart rate??

So I went in for my second US today!

Got to see baby, yolk sac, and little heart flicker!

Measuring at 6w today!

So my concern is that the tech told me the heart rate was measuring between 90-100, she actually said had I come in just one day earlier I may not even have been able to see it just yet

Doc called to go over results (they always do - not just if something’s wrong)

She said her report said 79-90 was the heart rate and it was on the lower end. She didn’t seem super alarmed, I did ask her if it was a sign I was going to miscarry and she said no not necessarily. I know it can change by the second based on baby activity and when they snap their pics.

I go back in one week for a follow up to make sure it’s going up but wanted to see if anyone else experienced a lower first heart rate?

I feel like 90-100 isn’t super low but then having another measurement of 79-90 makes me a little nervous

Anyone else have something similar?