I am supposed to ovulate in the next couple days. I am on cd 15 right now. Haven't gotten a positive opk yet and I've been testing since cd 7. All day I have been having cramps that feel like my AF is coming?? Could they be ovulation cramps? I've never really paid attention before so I'm not sure how they would feel but I've read that they usually cramp or pinch just on one side and I'm having cramps throughout my whole lower abdomen and even in my lower back.