Scared I’ve used doppler too much 😭

L

I used my doppler two days ago, then had an appointment with us and doppler, and I used it again today. Now I’m reading online that it can heat up tissue and hurt the baby’s brain 😭😭 I feel so terrible and worried. My doctor says it’s safe but I’m not so sure anymore 😭

I’ve also had 6 ultrasounds and I’m only 12 weeks.