How do you know you’ve had a missed miscarriage?

Alora

I just found out what that was and I’m kinda freaking out. I symptoms haven’t completely gone away, but have decreased a lot within the past couple of weeks. We had a ultrasound at 8 weeks 5 days and heard the heartbeat of 181. But what scares me to is that I was supposed to be exactly 10 weeks the day of the ultrasound. I ended up being 8 weeks +5 but at the same time, we heard a heartbeat. I’m just super paranoid.