A few weeks ago, I had what was thought to be a stomach virus. For 5 days in a row I couldn't keep nothing down and had constant diarrhea and throwing up. I went to the ER once and urgent care 2 days later because of the need for fluids. The throwing up stopped but the diarrhea was constant and was like water. I was really sick. Test were done twice in those 5 days and everything came up good. I finally felt better and here we are 3 weeks later and I feel like it's a repeat of what happened. I started feeling really sick last night with vomiting and diarrhea....can it really be a stomach virus again????