Hello, my last period was Jan 8th (first day) and on jan 18, my BF and I were in the shower and engaged in some genital rubbing as well as some mutual ejaculation; where he ejaculated downward underneath me (I was standing on my toes leaning on him) no semen got on me then, however I am worried perhaps when we were rubbing that between standing under the shower and pre-ejac it may have "dripped down" into my entrance. It is now February 18th and I have no period but a swollen stomach and very sore boobs. Is it actually possible that I be pregnant from no penetration? I know you can't give me definitive answer-put hearing opinions helps (I'm not a teen)