Heartbeat at 12 weeks

Kelsy • 21 years old, engaged with the love of my life and we have a beautiful baby boy 01-28-15 💕
I am now 12 weeks and 4 days, took awhile for the doctor to find the heartbeat, but he was hiding. The heart beat was 148bpm.. I keep seeing everyone have 160bpm or more. Is 148bpm normal?