How likely is it to get pregnant from no ejaculation, birth control and a condom? feeling nauseous everyday (3weeks) since the sex, we have no stds.

Not likely at all: Sometimes, it can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result if done correctly. One can test about 3 weeks after sex (when conception might have occurred), or 1 week after missing a period. An ob-gyn doctor can evaluate any persistent or worrisome symptoms.