Never missed a pill. I haven't had sex with my boyfriend since October of 2015. I had irregular periods before last month I had a regular period but never missed a period. Could I possibly be pregnant even though I haven't had sex since last year. I also been very stressed out for the past two weeks because my grandmother passed away. On sunday I started having diarrhea when I was supposed to get my period I've been taking I modium and helped a little but it came back I also feel a little nausous. I went to the Dr. She said it is a virus and if it continues until sunday to go back to her. She also told me that they might lower the bc pill dose because when I went in today my blood pressure was too high.