Hi Doc;

I started my last periods on 14th June and I am on a 28 day cycle. I expected to start my periods on 12th July and until now i have just been slightly cramping and moody. I have now missed my periods for 3days. I had a pregnancy test yesterday and 2 days before; the results were negative. How long can i wait to test again. I am married and have never had children. I am not on any pills.