5 days late!

Okay ladies, I'm going crazy! I am now 5 days late and I test 1 day before my missed period, on the 3rd day of my missed period and today on the 5th day. All have been negative. I've been peeing like crazy and have been getting headaches a lot. These could also be period symptoms, but either way it's driving me crazy. What do you ladies suggest I do at this point?