Fetal heart rate at 6w5d??

Amy
We had our first scan this morning at 6w5d (we had it early due to mc last year so we're pretty anxious) and the fetal HR was only 70-80bpm. My OBGYN told me not to worry about the rate at this early stage but that it has a heart beat...however I'm still freaking out! We are having a repeat scan in 2 weeks. Anyone else having similar fetal HR?