Heart rate advice

Lene

Hi! So i had a private scan last week at 9+3. The nurse said everything was looking perfect and babies heartrate was 120bpm. I never thought anything more until i started reading on here and compared to everyone else this seems a very low heartrate? I assume the nurse would have said something at the time if it was not normal. Has anyone else had a low heartrate at this stage and im i over worrying? Thank you very much in advance x