I am 5 days late but got what I believe to be a negative result.. help?

I am 5 days late as of today. It is not normal for me to have irregular periods. I’m literally a every 28 days on point kind of person lol so being 5 days late had me pretty convinced that I could possibly be pregnant. So I bought a blue dye test (I know, the worst) but I can’t tell if it’s just an evap line or a faint positive? I figured 5 days late there would be a visible line. Any thoughts? Thanks!!