Hi @nixbroome, and welcome to Mayo Clinic Connect. You came to a great place to get answers. I am sorry you have been dealing with this for so long. How have you handled treatment in the past before you were diagnosed? Are you referring to the FODMAP diet? Here is a great video on Connect about that specific diet and how to navigate it.
https://connect.mayoclinic.org/page/gastroenterology-and-gi-surgery/newsfeed-post/a-map-for-the-fodmap-diet/