Fetal Doppler Help!

Leigh Ann • Baby boy #2 due 4.30.22 ❤️🥰

I’m 10+4 and my sonoline b fetal Doppler arrived today. I was so excited to use it to find my baby’s heartbeat. I watched several YouTube videos and read some tips online, but after searching for 10-15 minutes I still couldn’t find it! Is this normal? Could it be too early still? I am slightly plus size, so I was wondering if that has anything to do with it. Anyone with experience or advice?