Update!! Help-13 dpo- is this an indent or very faint line?

Af is due on Tuesday. I took the pictures in three different places just to be sure that it is not light reflection. The first one is taken within the time frame. There is a difference of 3 minutes between the first and third. The second picture

is taken in between.

Update: added another pink dye test below and yesterday’s frer test. Will go later to buy more frers.

Yesterday’s test below: