K.F.
It could be illness? It just doesn't sound like it though. I'd wonder if it were something she was eating or a toxin in the home. I've recently done some research on toxins in the home. You can read about it on my blog www.hintsforthehome.blogspot.com
Her feeling this way could be her bodies initial response to entering where the toxins are the most concentrate. I would love to hear what you find out. I am interested if it is toxins or not. I love to research so that I can help others!
Hope this was helpful!