Low hcg levels, is there any hope?

Brittany • 👼🏼10.12.19;👼🏼 6.28.19;👼🏼 11.15.19

I’m sorry I know I asked this earlier. I am 5 weeks and 5 days now. My levels yesterday were 820. Which is up from 260 5 days earlier. My OB is concerned they didn’t go up higher. They scheduled an ultrasound next week to see if there is something wrong. From the tone in her voice on the phone they are pretty sure I’m going to miscarry. I have had cramping and some sharp pains briefly, but no spotting. Idk what I’m looking for I guess, hope? I know there is nothing I can do. I want this baby so bad, I’m just praying that it’s all going to be ok. According to my doctor my hcg levels should be in the thousands by now.