When should I POAS?

I've been off of birth control for almost a year. My partner and I never use protection and he does not pull out. I guess you can say that we both know this is very risky but we've been months without any scares. I'm a few days late here and there for periods but the pregnancy tests always come out negative. This time however, I was due today for my period but have had little to no PMS. Should I wait a few more days before peeing on yet another test?