Heart rate at 6 weeks

Reece
I had an u/s this morning to make sure everything is going as planned. I am 6w4d, but measuring at 6w. The u/s tech said that was normal. The little nuggets heart rate was at 103. I asked if that was okay and she said that if she was concerned she would tell me and have me back next week. I was reading that the heart starts at 80bpm, so I guess that's an okay number. I know with my son at the exact date, he was at 122bpm. Anyone have anything similar?