My last period date is December 30th 2020. I found out I was pregnant yesterday. And on the BETA HCG blood report it states that my hcg is 31,900 which shows as 6 weeks pregnant

But when I visited my doctor today she said I might be about 4-5 weeks pregnant and she was shocked to see that my HCg was high. So she scanned to see if it was multiple pregnancies. But there was only one sac. She said the sac was placed in the correct place and everything seemed normal.

I was said it’s too early for a thorough scan and to come back in 3 weeks.

Below I hv attached my HCG blood report. Is it normal ? Why was my doc so surprised. I’m so worried.