I had unprotected sex 3 days before and during my last period. i just got my next period. it was a bit lighter and i've been nauseous . am i pregnant?

Not likely: I do not think so providing that your period came on time last period. You only can get pregnant if you have intercourse during mid- cycle.

Sex during period: Sex 3 days before and during period is generally low risk for pregnancy. Your next period was a bit lighter and your having nausea, yes there is a low possibility of pregnancy. To be certain, do perform a home pregnancy test or call your doctor for advice.