One line, 2lines, one line, no line?

Period due in 4 days I have been tested all week and nothing but one line. Tested this morning (excuse my yellow pee, I took my supplements at night and they make my first pee super yellow) and I this saw a very very fain line but I thought it was just my eyes. Got home from work and tested again, left test in bathroom and came back about 7 min later, and I saw 2 lines!

So I sat in the toilet until I peed again and tested the last two times (different brands) and that's the second picture. So confused😫

What do you all think?