Heart rate at 171 at 13 weeks 5 days

Llaycee🌼 • Momma to Graycee 🍼 Wifey 💍 Business owner ❄️ Child of God✝️

My little bean is growing great! Measuring 2 days behind but was told at this point it’s normal for growth to slow down and speed up. However my question is the heart rate.. the baby’s heart rate at 12 weeks was 163 and now it is 171. I was told by a friend it is supposed to slow down by this gestational age. Has anyone had experience with this? I’m a first time mom, but this is my second pregnancy. I lost the first pregnancy at 6 weeks.