Intermittent nausea/vomiting for a week..the onset seems random. my boyfriend has the same thing. no other symptoms, not pregnant. what could it be?

Virus? Bad food?: It is likely that both of you have eaten some food that caused an infection or you have some virus because both of you have the same symptoms. See when the symptoms began and see if you ate something questionable in the 4-12 hours before you started the nausea and vomiting. In a healthy person, these types of infections take care of themselves. See a doctor if you can't keep any liquids down.