Scare with doppler

Now I see why doctors recommend women not to rely on dopplers. Im 9 weeks today and I wanted to hear my baby heartbeat to just know baby is ok, I heard baby heartbeat 3 days ago so I figured it would be easier to find baby now. So after about 20 mins I couldn’t find the heartbeat. Then i tried again for another 20 mins and nothing. So I’m balling my eyes out telling my husband I don’t hear the baby. He’s like the baby is fine and I’m like no no no. So I tried again for about 10 more mins and there it was the baby heartbeat. I freaked out a lot, I was so scared it was over with. I think I might leave the Doppler alone for a while. Cause I almost had a heart-attack.