5 days late help

Charlee

Hey ladies, I don’t normally post here, but I am so confused at the moment. I’m on CD 40, and typically my period shows up between CD 32-36, well I suspected it was coming Wednesday. Well it didn’t, so I waited until Friday and took a test. It came out negative. Now it’s been 5 days late and still no signs of a period. Should I test again? What’s going on?!