Accurate?

I tested friday night with an first response & it came back negative & i had posted here that I’ve had it from a year ago although it was still sealed & not expired. So i tested again this morning with morning urine & went to buy another box of early response & came back negative. In one app I’m 11 days late & in glow I’m 1 week late. I have no symptoms at all, i feel completely normal. Am I probably just normal late if those test are 99% accurate & by how late I already am?