HcG slowing but still doubling?

Laura

I am waiting for the doctor to review and call back, but I had my 3rd blood draw and my hcg doubled, but just barely. My previous test nearly quadrupled. I have no idea if that is something to worry about?? I have had 3 losses in a row and I’m so nervous!

Thursday 477

Saturday 1670

Monday 3350

Anyone have any insight? 😫