sounds to me like a sodium /potassium imbalance with dehydration.
but of course that is just for starters.
mercury is a big issue with kidneys. look at addressing that.
you need more vitamin C. and when the Lugols comes, do yourself a big favor and take enough of it to begin with. 16 drops of 5% or 100mg, however many drops of the 2% that is. first dose. have the salt and water standing by.
low salt diets are an invitation to a hospital visit for the saline IV cure.