Hello, thanks for using health care magic If your boyfriend didn t ejaculate in you, then you can not definitely become pregnant. Pregnancy can only be possible if sperm cells are deposited in the female genital tract during her fertile period such that the sperm cells get to fertilized the female egg cell. Though precum might contain sperm cells, the amount most often is small to effectuate fertilization, moreover, his precum was not deposited inside you since you say you both never had penetrative sex. Missing a period sometimes is possible and sometimes its not related to any disease (occurs spontaneously) and its only when it persist that it becomes problematic. Stress as well can delay menses. Without the penetrative sex, the pregnancy test will definitely be negative. Hope this helps you Dr Achuo