Fluctuating heart beat?

Taylor

So I got to hear the baby’s heartbeat today and it was 134 and I’m 14 weeks 4 days pregnant. The first time I heard it, I was 11 weeks and it was 160. And then at 12 weeks 3 days and it was 155. I know at 12 weeks it drops a little but is this normal? Has anyone else’s baby done the same cause none of my friends have 🤦🏻‍♀️