@gracief have your parents thought about getting a second opinion on your diagnosis or talked with the doctors about still having the symptoms you are having? I have no medical knowledge or experience but I would want to explore every avenue to find something that helps with the symptoms you are experiencing.

Another section of Connect to explore are the Pages. There is a Gastroenterology & GI Surgery Page where you can read shared experiences, learn about clinical trials and up-to-date research, and find resources for gastroenterology. If you click All categories and select Recipes there are some really good gluten free recipes that may help.
https://connect.mayoclinic.org/page/gastroenterology-and-gi-surgery/
Hoping you find some answers.

John