2nd ultrasound in two days. 7 weeks.

I had a mc with my first pregnancy and had a healthy son my second pregnancy. Now preganant the third time and hoping this baby sticks. I had my first ultrasound at what I thought was 7 weeks but the gs and baby measured 6 weeks, didn't see a heartbeat.  Dr said I ovulated late as I have long cycles. Just so nervous for this next appointment. I really want to see the heartbeat and know my little one is ok. I'll be 7 weeks +4. 🙏🏻❤️