Low heart rate on home Doppler

Elizabeth • Mommy to 3 angel babies and my rainbow baby 🌈

I'm 10 weeks 4 days and this morning got a low heart rate of 70-80 range on my fetal Doppler. I tried for at least 10 minutes and never got a number higher. I could even hear the heartbeat. Should I be worried? I know a lot of people frown upon using these