Negative blood work at 10DPO

Shelbi

I had 3 faint positives today. First response, first response test strip, and clear blue. But my blood work was negative. Took a Walmart cheapie, faint line. And another cheapie, faint line. Right away. Anyone else have negative blood work and keep getting positive tests?? Or have negative blood work at 10DPO but positive after 12DPO?