14th days of my cycle, supposinly my ovulation time. For the past two weeks i have had cramping, a tight pulling feeling in my lower abdomen, tender breasts and and very gassy, It was strange cause i have never had PMS so soon. Two days before my expected ( 25 of nov) i got that feeling i was going to get it, however, i never did, I am now three days late, which i have never been, I did a HPT , today and it was negative. Do you have any explanations what could be happening to me? thanks so much,