Sorry I never used a Doppler before on myself , only in office. So the Dr used the Doppler for the first time basically my whole pregnancy & she said she heard like an echo , asked me if I was having twins. I told her no. She asked me if they moved the wand around during my US. Asked me what my heart rate usually is , which is low. Usually in the 80s never above 100 lol. She said it could be the placenta. And we sort of brushed it off. Said I’ll find more about it at my anatomy scan. Now I’m worried about twins or like Idk a heart issue. Like she freaked me out lol. So how common is it ? Is it just something that happens or should I be worried at all ?