The blood test is more sensitive and thus picks up the presence of HCG (hormone
) at lower level than the home kit can.
Thus, in early pregnancy, the home test can often turns positive after 2 wks, but the blood test can pick as early as 5-7 days after conception. So if your test is negative, you can waite for an other wk and retest. If u can't waite then consult your doc. Good luck.