Hcg 4 weeks & 4 days!

Hey guys! I have been worrying myself sick over this tiny little baby! Had my HCG checked yesterday and it was 549 (woohoo) and progesterone is 28.7! I’ve had much bolder tests too so I was hoping I might relax some but NOPE! When is yalls first sono? Mine is scheduled for 6 weeks and 4 days. Some of my co workers are worried that is too early and swear they couldn’t hear their babies heartbeats that early. My last pregnancy it was at 6 weeks exactly and we could hear and see his heart beat.