I am using tri-sprintec birth control. I had unprotected sex with my fiance the night before going on the white pills. this is my first pack of this birth control so i have only done three weeks of it. Before this birthcontrol, i was on several others trying to pick the right one for me and had a complete week or no sort of birth control at all right before i started this current one. i am now on day two of the white pill with no bleeding at all... could i be pregnant? i also took The Next Choice pill 48 hours after the incident... im super concerned.. please help?!