hcg and ultrasound help!!!

12dpo - 41 hcg (was taken in the morning)

14dpo - 176 hcg (was taken in the evening)

17dpo - 450 (was taken in the morning) - i’m supposedly 4 weeks 4 days and feel like that’s a bit low.

Is the 14 - 17dpo an appropriate rise. A bit nervous because they were done around 60 hours apart. My maths is bad so idk. Pls help ❤️❤️❤️

I also have an ultrasound on friday and i’ll be 5 weeks 1 day. Idk what to expect to see. If you have ultrasounds from around then could i please see??

Thanks so much!!!