Norovirus

In 2003 I had a norovirus after a full day's contact with cruise ship passengers. I haven't been the same since. I never fully recovered. For the next 18 months I had approximately 8 what seemed like relapses, same symptoms, not quite as severe, I learned to control the "outbreaks" by controlling my diet (very low fat, small simple meals). Still, I suffer from terrible fatigue and flu-like symptoms including recurrent (less frequent now) 4-day cycles of nausea, no appetite and that end-of-flu malaise. I'm wondering if anyone else has experienced anything like this?