This is what is happening! I don't remember exactly what the date that I had my last period, but I am guessing aroung the 10th of March. My husband and I have been sexually active and we have been careful. Now I should have had my period. I am pretty regular but since last week or so I have been feeling sick. My head hurts and I feel naseaus. I have camps like I got my period but no period. I took HPT but they came out negative. I am feeling so uncomfortable.