I got a tubal ligation a year and half ago. My periods have been very regular...28days like clockwork. The first day of my last period was November 20. I am over two weeks late. Two weeks ago I had some side pain, almost felt like a cramp from running. Lasted a few hours. Since then I have had heartburn,headaches, sore breasts, nausea, some pain and fatigue. Took a pregnancy test two weeks ago and it was negative. Took another one last week and still negative. My symptoms get worse as the time goes on and no period in sight.