Small intestine bacterial overgrowth

I had it once and after antibiotics got my intestinal flora back in balance with greek yogurt, kefir and probiotic supplements after a long time. After that I’ve only got flora imbalance in my large intestine several times and has been easier to get back in balance faster

Sounds like an enzyme insufficiency (which I have). I take CREON pills (expensive), which is an enzyme used to replace my internally generated enzyme. Helps to digest food properly. I also have an intestinal overgrowth which creates a great amount of gas and constipation. There are some answers (depending upon what you have) but you’re not alone and once the doctors determine what is wrong, you can obtain help and probably get into a much better place. It is not easy and will probably take some time but hang in there and good luck as you find the answer to the cause of your condition.