Hcg levels-help!

Krystal🐨
About three weeks ago I found out I was pregnant. My lmp was december 20th, but im very irregular so it's hard to say exactly how far along i am. My initial hcg was 53,000. About a day and a half later it was only 56,000. I'm so anxious, and I have to wait another week for my ultrasound. Any words of encouragement or should I just expect the worst?? 🙁