A pathogenic gut flora, and allergy to it.Go to the Candida Forum . THe list of symptoms is ;yours, every single one.
If you are in America, you will have great problems convincing doctors that you have this.In Australia, you can get faecal transfer, in many parts of the world, you can buy Nystatin over the counter. I study Candida as a side effect of studying Dyshidrosis. If you can't get Nystatin, contact Doug Kaufmann