I did not have sex. I dry humped with my boyfriend (I had no underwear, he did). There was no ejaculation, only possible precum. This was November 24. my last period was November 11, but I am extremely irregular and go months without a period. I did not think I could be pregnant but for about a month my breasts have been incredibly painful and the last few days I've had lower abdominal pain. I took 1 preg test today and it was negative, but I'm not sure if I should trust it. How likely is it I am pregnant?