I've been to the hospital as I was very ill throwing up every half hour for a full day, I got diagnosed with a virus and a kidney infection at the same time. It's now the fourth day, my virus has seemed to of gone, im just on antibiotics for my kidney infection, however every time I try to eat it feels like it's sitting in my throat, like I need to be sick constantly, and I haven't pooped since a week ago, I've tried to eat quite a bit but I don't need to poop at all? What's going on?