I would stick with his advice. He is basically more or less stabilizing your symptoms right now and then he will go for the sneak attack with the pleo remedies.
He thinks nystatin causes the yeast to go deeper in the body where it is harder to kill. Candida is very smart and adaptive.
His treatment involves removing the environment for it to thrive and then destroying the cell walls of the yeast with the pleo remedies. It isn’t going to be an overnight change as you can tell.
If anything I would do enemas with the nysttatin but I would seek bernies’ advice.