rainbow baby 7w ultrasound heart rate 💗

Dee
Hi girls, 
I just had my first US and everything looks good (sooooo relieved). My question is what was your baby's heart rate at 7wks?
Mine is 144bpm. The sonograph chick said it was a good strong heart beat however on google it says between 99-120bpm.
(I know I shouldn't google lol)
Thanks girls. 😊