Hcg levels at 6 weeks

Janelle • Baby #1 due November 2nd
I took my first blood test at 6 weeks 1 day my HcG was 39,000 took them again at 6 weeks 3 days and he said they went up but I didn't ask how much I was just excited they were going up. Is 39,000 a lot? Could that be twins? 

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