7 weeks 6 days w/ heartbeat of 122 - too low?

Kathe

Had a scan a few days ago and baby was measuring exactly right at 7 weeks and 6 days, with a heart rate of 122. Doc said she’s happy with how things look, including the heart rate, but everything I read says that it should be higher, which seems consistent with what I see ppl posting here. Does anyone have knowledge or experience with this? Should I be worried? This is my third pregnancy after 2 miscarriages so feeling extra anxious...