HELP!

Hey ladies, I’m currently 7 weeks and 3 days. On March 12th I got my blood taken and my hcG levels were 659, March 20th I got them again and they were 4,086, March 28th I got them again and they were 23,292. They seem really good! All my tests have been positive and haven’t faded any. I don’t have my first ultrasound till the 9th and I’m really nervous bec right now my only symptoms are sore boobs, fatigue, and every other day I get really bad nauseous. I am just so scared to go to my US and have to heartbeat. But sometimes I just don’t feel pregnant at all. Any advice?