Quick question

I'm 8 weeks and 3 days. I went to and unreason yesterday. A private one. Because I won't see the ultrasound for another month. The only did an abdominal ultrasound. I paid 50 bucks for it and they said "you might be earlier" but the the tech was like "no she is just 8 weeks." I was 8 weeks and 2 days when this was taken. Computer screens heartbeat 179. Just wondering if anyone else's ultrasound that small? My hormones are freaking me out saying I hope the baby didn't stop growing. Someone tell me my hormones are just going crazy and everything is fine and I won't miscarry. BIG FEAR OF MINE. Thanks in advance