Anxious!!! 😖

I had my HCG levels drawn 10/7 at 264 and Friday they were 794. The doctor made a note on my chart to have me come back this Wednesday and have it drawn again. I am currently 4w3d pregnant and am wondering are these levels normal? And does anyone know why she'd want a repeat these. I won't actually see her until November 12th. I just requested to have levels drawn for my own comfort !