During ovulation my boyfriend ejaculated in me during intercourse.. it has been about five days- i am nauseous and cramping. is this early pregnancy?

Possible: Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about two weeks for the embryo to make enough HCG to produce a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. Please seek care from a doctor to protect your and your baby's health.

YES, however...: Anyone who has unprotected sex during ovulation has a significant chance of becoming pregnant. Most women don't have any pregnancy symptoms until after they miss their period but a small percentage do report nausea ; cramping within days of conception. But these symptoms are non-specific ; don't necessarily mean that you're pregnant.See http://www.Countdowntopregnancy.Com/early-pregnancy-symptoms/.

Sure: Having sex at the time or ovulation gives the greatest chance for conception. The pregnancy test will become positive by 10 days after conception - so you can do the pregnancy test in another 5 days and find out.