Also new to this site but certainly not unfamiliar with the subject matter. As an alternatively-minded M.D. for 15 years have treated several thousand people here in Florida for Gut Dysbiosis (Candida), Leaky Gut, Immune deficiencies, etc.
Thought you might like to know that the "Brain Fog", and you gave a good description, is likely cused by neurotoxic influences produced and/or promoted by Candida. Sugar
activates candida metabolism and some of its by-products are neurotoxins such as formaldehyde, alcohol and acetlyaldehyde. Really bad neurotoxic and excitotoxic issues also with Mono-Sodium-Glutamat (Natrium Glutamat)
Please remember that all these dysbiotic-produced toxins have effectively weakened your liver's cytochrome P450 detox pathways. Phase I (toxin breakdown) and Phase II (elimination) often get unbalanced. Toxins get past the liver, into the cellular world of our bodies and create many of the conditions people are stating on this site. Nothing is spared; Musculskeletal, Neurological, Cardiovascular, Immunological, etc. etc. All systems are under free-radical attack. The body throws water to dilute this so your celular membranes (the brain of your cell)is somewhat protected. Remember this nmemonic: "The Solution to Pollution is Dilution". Hence the bloating, puffy eyes, finger edema, weight gain, etc.
Hope this helps and that you continue improving in health.
Bruce R. Dooley, M.D.