Baby heartbeat

So I got an at home Doppler for Christmas and I’ve been using it the last few weeks to see if it works good enough to read the babies heart rate. I am 11 weeks and 3 days.

Well my baby likes to hide so it is almost impossible to find their heartbeat but I found it a couple times now. I just could never get a reading.

This last time I found it it sounded like an extremely fast heart rate even for a baby. I’m concerned i may have heard two heartbeats or maybe my Doppler picked up the placenta as well as baby? Bc there was like no break in the beats at all. It was just “pumppumppumppumppump”