Stick with fruits and veggies high in SOLUBLE fiber first, the big two being bananas and potatoes. Stay away from salads and raw veggies for now, you can add them back slowly later. Cooked veggies are okay as long as you eat them WITH soluble fiber foods like bread or rice or pasta. Chopping them up fine, like for soup, also helps.
With fresh fruit, peel it and have it with soluble fiber. Good luck and thanks for sharing your story.