A week in a half ago my sister and my nieaces had diaherra and my sister would throw up.. 2 days later I began to notices I had diaherra as well. Didn t throw up just had nausea .. A week later my girlfriend began to throw up and have diaherra.. The thing that I m concerned is I didn t throw up I only had diaherra for a day..I never threw up. Now a week in a half from all this starting I still have bad nausea is that possible ? To have the flu or it must be something else? Headaches here in there.. But the nausea don t go away. With my girlfriend it started with nausea as well thank you.