The best advice I have is small portions, skip a day (no solid food) but plenty fluids, meal replacement drinks, eggs, potatoes, just about any fruit, try smoothies or shakes (as a treat). Soup! as long as it doesn’t have big chunks of meat. Water, water! It’s not fun, but it’s better than pain & suffering. I’ve been working this out for 4 yrs…I NEVER thought I’d skip a day of food in my life….but there it is…you work up to it gradually. It’s helped me. I could not go on with the pain any longer. So I took matters into my own hands. Unfortunately, everybody is different…have all the V8 or prune juice you want (or can handle)…a little vodka in V8 can’t hurt either…(just for a cocktail on vacay) lemon in tea.
Good luck