Hi there!
I'm so sorry you're dealing with this. We're here for you and understand your fear. Friday-Wednesday with v* and d*? That's not noro. 5 days with symptoms like that isn't normal. Could she be pregnant? Something else is at play and she needs to be evaluated. Anything beyond 48 hours with v*ed should be seen. I'm sure she's dehydrated at this point. Please advise her to get an appointment with her doctor. I wouldn't go back into that either nor do I think a non-emet. would. My friend is here with me for the afternoon and she shook her head when I inquired whether she'd go back home to that.
You're doing fine, stay for a bit longer until she's been properly diagnosed. That's my 2 cents!