False Negative??

Sophie • Married my love Oct 18 2014. I have a 6 year old daughter and 3 year old step son. Still undecided on if we want another.

I'm two days late & have taken two PT and both have been DARK negatives no mistaking it

Still no period though

Anyone get false negatives?

I'm giving it a couple more days to buy a different brand but just wanted to hear experiences to know if I should even test again