I had sex wit my bf 5 days before ovulation. i had a short/light period. im nauseous, i have lower backpain and headaches and really moody. pregnant?

Maybe, maybe not: 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.