I'm on Tri-perferviem Birth Control. I have been taking my pills on time every day. I've only missed 1 pill from the last row once in December. I think the last row are placebos? I've been on it since November. My period ended on January 5th. On January 6th, my boyfriend and I did some genital rubbing and he ejactulated AFTER we finish rubbing our genitals together. He did not ejaculate near my vagina or anything. Could I be pregnant?