Can someone plz give me some insight?

Brianna

So I had a chemical pregnancy & fell pregnant right after. So my first appointment my doctor did an ultrasound with her phone and we didn’t see anything in my uterus quite yet because she believed I was only about 4 weeks. I got blood work the same day for my hcg levels & these are my results vvvv

First draw was - 158

Second - 272

Third - 503

Last one - 885

She said they are within normal range but they aren’t doubling so I have to schedule an earlier scan next week.

Did anyone else have numbers like this & everything turned out okay? They’re rising but I just don’t understand why they aren’t doubling.