New Day, still unsure

Picked up 5 dollar store cheapie tests yesterday afternoon, DW peed on one this morning but it was invalid (no lines on either)  Did another one which appeared to be BFN, unless you held it up to the light of outside window and then there seemed to be a flicker of the tiniest shadow of a line.  Disappointed because I'd hoped for a darkening line today, but we are PUPO....pregnant until proven otherwse.