11 weeks how do I know my baby is okay?

Ashlee

I had my first scan at 7 weeks and the heartbeat was 153bpm. I don't have another scan until the 12 week one. I'm still having symptoms, nausea and extremely tired so I guess that's a good sign but the wait in between scans is scary I can't help but wonder is my baby okay? 🙏 photo is the 7 week scan