Day 45 still no period?!

Hi everyone
​I'm on day number 45 and still no period I am over two weeks late and it's not normal for me at all.
​All the tests have come back negative! I normally have a 28 day cycle and come on the exact fadt that glow predicts. I have had a lot of abdominal pain over the last week.
​I am booked in for blood tests this week. Is it possible that a urine test hasn't picked it up?!