Very faint line the 2 with no line

kchels

I took a pregnancy test this morning and it shows the faintest line that you can barely see then I took two more after the second one didn’t show a line at all and this is the 3rd one . I’m a day late on my period but I’m also breastfeeding but my period has been on a regular cycle for 4 months. Could it be positive? Or is it just a fluke ?