Hi dawn,Welcome to the Healing Well Wrapped Club! I am so sorry to hear that you're having so much trouble. Did you have all three Nissens done by the same surgeon? Have you gotten a second opinion?
When did you have each Nissen? What tests did you have to document the fact that each Nissen had failed?
With the problems that you're having, it sounds as if you'd benefit from visiting a great medical center for another opinion. Do you live in an area where you could reach one? Cleveland Clinic is highly thought of, I'm sure big hospitals in NYC would be very knowledgeable about handling difficult cases. The Mayo Clinics are another option. It depends on your location.
Here is a link to the best GI hospitals in the country:
http://health.usnews.com/best-hospitals/rankings/digestive-disorders
Glad you've joined us! I'm sure others will be by to provide support and information.
Good luck!
Denise