If bran is what helped you and oats do not, go back to eating bran! You have to do what works for you. What has your physician said? It sounds like you've been struggling for so long and you really need to push for answers if you are feeling so terrible...no one should be in that much discomfort every day.
Co-moderator - IBS Forum
Please always remember to consult your medical professional regarding your medical questions; this forum is intended to provide patient-to-patient support. Although some of us have healthcare backgrounds, we cannot diagnose or treat patients on the board.