Why every time I take a frer and look at it hours later it has a coloured test line?? Faint but pink and there???

Does this happen to everyone that uses frer?? Like has anyone ever taken a frer and looked hours later to find a stark white test???

I’m serious when I say I have taken dozens of frer in my years of TTC and every time hours later a second line shows up???

Do I just have a high natural hgc that pics up on these sensitive tests??

They never show in the time frame or even close to the time frame but hours later.

I know it’s not a positive I’m looking at cause I’ve been fooled too many times but does this happen to other ladies???