Nervous

Erica • Mommy to an angel 👼🏻 ; Pregnant with my rainbow baby 🌈💗💙

So I’m a little nervous after seeing a few others post about going to have an sonogram done and not finding the babies heartbeat at 12 weeks. How common is something like that too happen? My last sonogram was 2 weeks ago when i was 9 weeks and 6 days the heartbeat was 175 and the baby was bouncing around like crazy. I’ve had a miscarriage previously so it always worries me!