I feel like this question has probably been asked a million times but I couldn't find on searching - with the First Response (normal, not early results) tests, if there is a very faint line (and it's clearer when you put your phone light behind it) does that mean it's a positive? Or is there always a slight faint line there anyway when it's by the light? (And I'm talking about in the immediate window after using it not hours later.)
I have 2 kids but have been feeling v nauseous for a week and concerned about an unplanned 3rd...! AF due Saturday so was still a bit early to test.