AF was due this past Sunday, so I’m now 4 days late. The pregnancy tests I have taken (FRER) have all been an extremely faint line to where it’s almost invisible. Like I would miss it if I really wasn’t looking. But it’s there - and I made sure to look within the time frame. Even my test this morning was so so so faint. Shouldn’t my line be getting darker? I read maybe wait till a whole week after your period is due to test? Any advice would be great.