My period is a week late, and usually I am pretty normal. I have taken 3 pregancy tests within the past few days, and all were negative. My boyfriend and I fool around sometimes, and last time he ejaculated into a cloth. He says that nothing got on his hands, but his fingers were in me afterwards. My breasts hurt, but they usually do before I get my period. Could it be on its way? I finished a round of antibiotics about a week and a half ago and I guess I have been pretty stressed with final projects and exams this past week. Is it possible that I could be pregnant?