Hcg levels

Hi everyone! This is my first pregnancy and I’m super worried. I went for my first bloodwork a week ago where I seemed to be at 6 weeks with an HCG level of 10842 IU/L and I was worried about my lack of symptoms so I went to get bloodwork today and now my levels at 7 weeks 3 days is 29884. I’m so worried about how they aren’t increasing fast enough 😢 I have to wait until December 23rd for my first ultrasound. Does anyone have any advice, does this increase seem too low? Or anyone been in a similar situation?