Evap/vvvf line?

There is a filter on this, it's so light I can see it in real life, but it's barely showing in the pic. I did take this after the time limit (I already know all the issues with this, please don't give me a hard time). There's no color either. So my question is, anyone have a test like this and then in a couple of days have color in the line? I've taken a million tests and never ever had even an inkling of a line like this. That's the only reason I ask. Help! (I'm 13/14dpo