Please .. I need an advice

Hi there..my name is Iryinna ,I am from Portland ,Or,(US.citizen)and couple years ago I finish a nursing college in Romania;I do have all the papers and my diploma I did equivalate my school with an associate degree in nursing +ONE YEAR of undergraduate credites.
It is any aware of what should I do, to be a nurse in United States ?? or I have to go back to school here for this? ..please advice!