Can you post what you have done so far? This way someone who has had the same problem may see an open option to advise. Something you may have missed altogether.
Also a brief description of your diet, and the length of time you tried different protocols.
Not having knowledge to advise you on a cure, I send you good wishes for finding a solution that will help you.
Please don't give up on trying, sometimes it takes time to find the right answers.