Hi. I've been vomiting for 2 days and I also have burps that smell and taste like rotten eggs. Nothing else is wrong. No fever, no diarrhea, nothing besides those two symptoms. I can hold the vomit as long as I'm sitting or laying, but the moment I stand up I feel the vomit coming. I'm down to nothing in my stomach, not even the green stomach bile, just foam at this point. Should I visit an er or can this wait til I can see my primary?