6w3d heartbeat

Went yesterday for an ultrasound as I had a miscarriage last year and they wanted me to come in. HB was 116. She wasn't concerned as it is still early and most women don't go in until 8 weeks or so and i have to in next Friday for another one just for peace of mind. Little nervous as it isn't what they wanted which is 120 or more. Anyone else have this hand have successful pregnancy?