Heart rate

Chelsea

Hello, looking for some clarity or similar experiences. I had to have an ultrasound done at 6 weeks to make sure my pregnancy was located in the right area before starting lovenox. They saw the baby and the heart rate was 103. Everything I’ve looked up said this is basically in the normal range but they want another ultrasound in a week to make sure baby is growing due to the low heart rate. Is this heart rate concerning at 6 weeks? Has anyone else had an early ultrasound done and saw the heart rate?