I am on Sprintec birth control i take my pill every night. Sometime half hour before or after I should have taken it. Never miss a pill. I been with my boyfriend for 5 months now. I am sexually active. We do not use protection. He never cums inside of just to be cautious. I have already peed on a stick and the results were negative. I should have gotten my period couple days ago. I have signs of my period. I have cramps, bloated, tender breast but no period.??? what could be going on? Can anyone help me?