Advice please.. line?

Hey girls,

Due for my periods in 5 days. Have had super sensitive nipples for the past 4 days.

Went to buy a pregnancy test yesterday and got a super faint line, to the point I could only see it in certain angles. As the day progressed the line got darker.

Did another one this morning and it was there and faint again.

So went and bought another brand today and it was negative.

are these just evap lines considering the other bran was negative?