very positive HPT with negative blood result. anyone have this?

Has anyone had this? Im supposed to be 6w2d and i got blood work on tuesday and it was negative the lowest possible for hcg and progesterone. Anyone not get a positive blood test til later? I ovulated on 12/19-12/20.  I got my first BFP on 12/31/2016 and my darkest HPT on 1/4/2017 (day before my missed period) and its been dark ever since. Ive literally used 6 different brands and all are positive. These were taken two days after my blood work.