I am having severe headache, left nipple soreness, nausea, chills, skaky, burning up, some dizziness, and some lower abdominal cramps? The headache and nausea has been so severe that I have had to go to bed as soon as I got home. I thought it might have been the flu but then people keep asking me if I could be pregnant. I don t know if I am or not because my periods are every three months with the pill that I am on.