HCG Levels

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So I finally got my results back from Tuesday's hcg level test! The nurse said they were low and when I asked what they were she said 8,718!  All my research says that's a good range for 5 weeks! I had my last period on January 15! I think I should be 5 weeks and 2 days on Tuesday! I am waiting for today's test to see if it doubles! Anyone else have these levels and all is well!