Hi, i think i might have gastroenteritis. i've been nauseous all day, mi joints and muscles hurt, i have fever, my stomach hurts. i want to feel bette?

Time and rest: You may well be right about having gastroenteritis. Unfortunately, we have no cure for this. It's an illness your body must take care of. All you can do is listen to your body and take your cues from it. If tired, sleep. If nauseous, go bland diet or just sips of fluids. Usually lasts a couple of days. If then not getting better, or sooner if bad symptoms like persistent vomiting, see doc.