Hi first time mom at 17 weeks. My fiancé and I found out we’re we’re pregnant super early at 6 weeks. We’ve had one ultrasound at 7 weeks and we have our 20 week one scheduled to find out the gender. We purchased a Doppler so we could listen to our baby whenever we wanted and yesterday we were listening and we heard our baby’s heart beat but there was another sound in there too, another rhythmic thumping . We’re unsure if it’s another heart beat or an echo or what it is. Anyone have any idea what it could be? It was pretty loud. Thank you!