Sorry to hear about your struggles. I went through something very similar a couple years ago. I summarized my story in a TEDx talk about a year after I figured out what my GI issues were: https://www.youtube.com/watch?v=iR3_yIx2X0s
As some encouragement, it (slowly) gets easier and easier. There are foods I still miss, but after going from feeling terrible to feeling wonderful it becomes easier to say no to that soda or slice of pizza.
I’ll check it out, thanks!!