Too Many Ultrasounds?

Brianna • Mommy of 1 in heaven 😇 One Rainbow Miracle on the way 👣💙💚💛💜

I am 5 weeks 1 day and I wanted to go at 6 weeks and hear the baby's heart beat but then I would go to my actual doctor and they will do one at 8 weeks. my question is would a ultrasound at 6 weeks and then another at 8 weeks hurt the baby? I had a Missed Miscarriage in September 2017 and I'm scared maybe there is to much radiation and it hurt cause my baby to stop growing and heartbeating would stop??? please comment