I have been deathly sick for 17 years, and I have been definitively diagnosed with Lyme and a host of other issues and I can assure you that I am deathly afraid of my own body as well, because I cannot escape my own personal hell. It is not a phobia, more like PTSD from all the emotional trauma losing nearly 2 decades of my life to it. What she needs is support, not someone trying to come off as another doctor who doesn't believe her. And for the record, all my stool samples came back negative as well, but my saliva tested positive for roundworm and I have passed them not only in my stool, but passed a 5" long worm during a colonic, which the technician saw.