This are my OPK strip tests, they match up with my body and dating after a miscarriage but why are they so light? I have used different brands in the past and never get a darker line. I do ovulate, I have 3 children had 2 MMC and am in the tww now. Anyone get faint lines on these things? (The one at the top is a HPT after my MMC surgery beg of August, to make sure no HCG was left)