Betas doubling times?

Megan • MC: 5-17-15:: Lap-7-26-16: Endo warrior. DD born July 2017 🙌🏼💞 DD#2 Due June 2019

I had my first beta drawn at 4 weeks 3 days and it was 886. This morning at 5 weeks 2 days it’s 5402. They said they look great and dr doesn’t need to more blood work and scheduled me next week for ultrasound.

Does this look good? The doubling is every 55 (2.3 days) hours or so...

Is that slow?