hcg levels

Brittany
So my Obgyn has been monitoring my hcg levels due to a previous mc and my original levels were low. Here are my levels.
6/23 172
6/28 1197
6/30 2399
7/2 3389
Now I haven't heard from my Obgyn yet, I am lucky to see my lab results online. I was feeling optimistic up until this mornings lab draw. Now I have been reading that around  this level the levels do not rise as quickly. Any thoughts?