Fetal heart rate too High?!!

Dakotah • Pregnant with our 🌈 due in August ❤️

Had my first ultrasound this week at 6 weeks + 2 days and heart rate was 176. Everything I’m reading sounds like that normal for 6 weeks is 100-120 and this seems really high but my test result came back and doctor said everything looks normal and under the fetal heart rate portion it read within normal range?! I’m just freaking out about this?? Anyone else have a HB this fast??