Going crazy to test

Marie • Have Pey 9/08, 1 angel baby 2011,and TTC again

I'm a 30 day cycle gal. I also ovulate late. Today AF is due, I want to test so badly. I have had pressure/cramps, But I think that's from constipation, lol. Thing is, when I ovulate late glow moves my start date. Do I test now when my normal AF is due or do I wait until the 16th??

Oh and I'm completely impatient lol : )