First of all, forget everything you have read and everything that has been recommended because it is all incorrect!
None of it works or can work. It is all part of the psychological approach that attempts to weave it's influence into all these illnesses: ie think correctly and you will not be ill.
By this I mean, take this supplement to heal your gut where what is really meant is that if you believe it, it will fix your gut and it will work but in reality it will not.
All research fails to eliminate the stomach. They find Increased Digestive Permeability, I now use this term to correctly address where the problem really lies and will not use "leaky gut" because it is very misleading. All the research to date claim it is in the small intestine or the colon and therefore taking certain supplements should fix it. They will not fix it!!!
The mind cannot defeat an Antibiotic resistant infection which is beyond the influence of the immune system.
BTW my GP tried to make me believe this crap for years and I have finally worked out where her real intent lay. It did not work for her, because she has health problems which I know are caused by the exact same thing and it will not work for me. She even tried to get me onto a course in positive thinking and again it did not work for her. Doctors like this are prevalent in the system, doctors who think people are really only anxious or can fix asthma, Arthritis etc etc by thinking correctly. This is how much of the pharmaceuticals work, they do not fix the causes and use a placebo effect to get a result.
My question to you is how long do you want to continue suffering?
Do yourself a favour and take notice of what you are experiencing because it will indicate where the problem really lies. A clue, it is not in your colon or small intestine and you mentioned it in your post.