My boyfriend and I are sexually active daily. I am on birth control so we don't use additional contraceptives but I have skipped a pill or two this month (always taking 1 when i remembered as instructed), and he does ejaculate in me everytime we have sex. For the past 3 days, I've noticed a "fishy" smell but this is a first time occurrence. In the past someone has told me it could be caused from his semen and my body is just "cleansing". I am concerned because my period is 3 days late, and thats when the odor started occurring. Could this be from my vagina cleansing itself or could I possibly be pregnant? Please help!!!