Serum Testing

  I took a home pregnancy test when my period was 3 days late and it came back
  positive.  I went to the doctor and they immediatly gave me a blood test.  
  When I called for the results, they told me it was negative.  I felt this
  was incorrect and took another home pregnancy test and it continues to be
  positive.  I am 8 days late.  What could the problem be?  I just want to be
  sure one way or the other.

[hfhsmdrcs]

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