Any thoughts?!?

Ella
Hi ladies, 
Here's the situation- AF is a week late (I have never been more than a day or two late) I've taken 3 tests, which are all negative. I'm having extreme pressure and cramping and feeling like AF will show at any moment and never does. The other day I was convinced she was here and in total shock when I found out she wasn't. Does anyone have any ideas, suggestions or experienced this before? If so what were your results?  I'm making a doctors appointment today but would love to hear what you gals have to say!