I am so sorry. I know this conundrum well. I think I have tried everything. High fiber creates a very very painful and uncomfortable build up of gas as the twists and turns essentially stop all motility at that point and nothing gets through until days later it finally "unkinks" and I have a two-three day purge of diarrhea and vomiting. Then it starts all over again. Miralax does the same thing for me. I hope you find relief.