Doppler fail lol

Purchasing a Doppler was daft I'm not scared or worried in any way but when I hear the heartbeat (what I think is the heartbeat) it sounds slower than all the rest I have heard at 16 weeks , probably picking up my own or the placenta 😂😂 wish I wasn't such a porker I would probably have a better chance of hearing the wee toot.better leave it to the professionals 😁 On the bright side I think I am feeling kicks ... feels like little bubbles popping is that what it's supposed to feel like??